The Snowball Earth

Some very strange events have left their signs in the rocks of Precambrian time, the nine-tenths of Earths history before fossils became common. Various observations point to times when the whole planet appears to have gripped by colossal ice ages. Big-thinker Joseph Kirschvink first assembled the evidence in the late 1980s, and in a 1992 paper he dubbed the situation the snowball earth. Evidence for the Snowball Earth What did Kirschvink see? Many deposits of Neoproterozoic age (between 1000 and about 550 million years old) show the distinctive signs of ice agesyet they involved carbonate rocks, which are made only in the tropics.Magnetic evidence from these ice-age carbonates showed that indeed they were very near the equator. And there is nothing to suggest that the Earth was tilted on its axis any differently from today.And the unusual rocks known as banded iron formation appeared at this time, after an absence of more than a billion years. They have never reappeared. These facts led Kirschvink to a wild surmise glaciers had not just spread over the poles, as they do today, but had reached all the way to the equator, turning the Earth into a global snowball. That would set up feedback cycles reinforcing the ice age for quite some time: First, white ice, on land and upon the ocean, would reflect the suns light into space and leave the area cold.Second, the glaciated continents would emerge as the ice took water from the ocean, and the newly exposed continental shelves would reflect sunlight rather than absorbing it as dark seawater does.Third, the huge quantities of rock ground into dust by the glaciers would take carbon dioxide from the atmosphere, reducing the greenhouse effect and reinforcing the global refrigeration. These tied in with another event: the supercontinent Rodinia had just broken apart into many smaller continents. Small continents are wetter than large ones, hence more likely to support glaciers. The area of continental shelves must have increased, too, thus all three factors were reinforced. The banded iron formations suggested to Kirschvink that the sea, blanketed in ice, had gone stagnant and run out of oxygen. This would allow dissolved iron to build up instead of circulating through living things as it does now. As soon as the ocean currents and continental weathering resumed, the banded iron formations would be quickly laid down. The key to breaking the glaciers grip was volcanoes, which continually emit carbon dioxide derived from old subducted sediments (more on volcanism). In Kirschvinks vision, the ice would shield the air from the weathering rocks and allow CO2 to build up, restoring the greenhouse. At some tipping point the ice would melt, a geochemical cascade would deposit the banded iron formations, and snowball Earth would return to normal Earth. The Arguments Begin The snowball earth idea lay dormant until the late 1990s. Later researchers noted that thick layers of carbonate rocks capped the Neoproterozoic glacial deposits. These cap carbonates made sense as a product of the high-CO2 atmosphere that routed the glaciers, combining with calcium from the newly exposed land and sea. And recent work has established three Neoproterozoic mega-ice ages: the Sturtian, Marinoan and Gaskiers glaciations at about 710, 635 and 580 million years ago respectively. The questions arise as to why these happened, when and where they happened, what triggered them, and a hundred other details. A wide range of experts found reasons to argue against or quibble with the snowball earth, which is a natural and normal part of science. Biologists saw Kirschvinks scenario as looking too extreme. He had suggested in 1992 that metazoansprimitive higher animalsarose through evolution after the global glaciers had melted and opened new habitats. But metazoan fossils were found in much older rocks, so obviously the snowball earth had not killed them. A less extreme slushball earth hypothesis has arisen that protects the biosphere by positing thinner ice and milder conditions. Snowball partisans argue their model cannot be stretched that far. To an extent, this appears to be a case of different specialists taking their familiar concerns more seriously than a generalist would. The more distant observer can easily picture an icelocked planet that has enough warm refuges to preserve life while still giving the glaciers the upper hand. But the ferment of research and discussion will surely yield a truer and more sophisticated picture of the late Neoproterozoic. And whether it was a snowball, slushball or something without a catchy name, the type of event that seized our planet at that time is impressive to contemplate. PS: Joseph Kirschvink introduced the snowball earth in a very short paper in a very large book, so speculative that the editors didnt even have someone review it. But publishing it was a great service. An earlier example is Harry Hesss groundbreaking paper on seafloor spreading, written in 1959 and circulated privately before it found an uneasy home in another large book published in 1962. Hess called it an essay in geopoetry, and ever since the word has had a special significance. I do not hesitate to call Kirschvink a geopoet as well. For instance, read about his polar wander proposal.

Personal Narrative The End Of The World - 766 Words

THE WORLD WAS finally ending. There were less than 10,000 people -and non people- left on Earth. And the Others were not finished with us. Unfortunately. There was still Sammy, Ben, Ringer, Teacup, Dombo and Poundcake and I left that I knew personally. But we were all in danger. No matter what we promised to protect each other. No matter what the circumstance are, or what is at risk. I dont actually want to help save anyone but myself and Sams. But, I agreed anyway to make everyone happy. It’s like insurance, so I guess it won’t be that bad. The first couple of days of the agreement were fine, only because no one was in danger. But then came the next day. Ringer and Ben were out looking for a new place to move our camp. They had†¦show more content†¦Not that I wanted to die, I just had a promise to keep. Now I understood the purpose of our little agreement. She obeyed out of fear for herself, not because I told her to. I shot an entire clip before moving around. Ben appeared out of the bush about ten yards to my left and said â€Å"Cassie, Ringer is down! Come quick!† Teacup and I raced over to Ben on the ground next to Ringer. She was bleeding like crazy. It was everywhere. Ringer was close to bawling her eyes out because she was is so much pain. She was shot in her lower back. None of us really knew what to do, so we just tried to wrap the wound and apply pressure to stop the bleeding. That’s what Dumbo does†¦ I think. We had to get her back to our camp. Ringer shouts in pain as we lift her off the ground. But, she doesn’t squirm, which is good. What if we lose her?! Let’s hope not. Here we come Dumbo. Since Teacup was too small to carry Ringer, she lead the way and also tried to protect us from the back where the Others still waited. Thank God camp wasn’t far, because Ringer was no Teacup. We get there and Dumbo greets us instantly. He has a worried look on his face that says This is not good and unexpected. She might not make it. Sams and Poundcake also greet us, not quite as worried though. We all stand around as Dumbo goes into full surgegen mode. He rips off the bottom half of her shirt and begins cleaning the bullet hole. She winces in agony every time another gauzeShow MoreRelatedAnalysis Of Scribner s Article, Scribner756 Words   |  4 Pagesand personal narrative. The whole class was thrown for a curve ball when we were assigned Knoblauch for our first assignment. After rereading the material a few times, I began to understand what Knoblauch was trying to convey to us. His argument states that there isn’t a definite definition of literacy. He breaks literacy into four different categories. Functional literacy, critical literacy, liberal literacy and cultural literacy. Out of all the categories, I connected to literacy as personal growthRead MoreNarrative Is The Root Of Some Fields1510 Words   |  7 PagesNarrative is the root of some fields which includes education, rhetoric, literature, religion, law, history: culture (Wilson, 1989). It can be seen as a tool to create traditions and symbols as means of communication and it is a source to understand and strengthen the identity of the organisation (Kroeze and Keulen, 2013). As a conceptual theme, narrative becomes a self-conscious system and a reflexive field. In other words, the role of narrative in personal lives is to show how it can be utilizedRead More Narrative of the Life of Frederick Douglass Essay907 Words   |  4 PagesNarrative of the Life of Frederick Douglass   Ã‚  Ã‚  Ã‚  Ã‚  The tone established in the Narrative of the Life of Frederick Douglass is unusual in that from the beginning to the end the focus has been shifted. In the beginning of the narrative Douglass seems to fulfill every stereotypical slavery theme. He is a young black slave who at first cannot read and is very naà ¯ve in understanding his situation. As a child put into slavery Douglass does not have the knowledge to know about his surroundings and theRead MoreWhat Should I Write About Your Personal Narrative Essay932 Words   |  4 Pagesbecomes necessary to type personal narratives, without so much as a hint of a topic, it can drive a student to some rather interesting conclusions. Some of these conclusions may be as simple as â€Å"Hmm, what should I write about?† Or perhaps more complicated and â€Å"Great, it’s 2:00 A.M. the day the paper is due and I have nothing typed.† No matter the situation the creative thinking process can be greatly li mited, thus I present to you the narrative of me typing my personal narrative essay. It began ratherRead MoreNarrative Voice of Frederick Douglass920 Words   |  4 PagesNarrative of the Life of Frederick Douglass The tone established in the Narrative of the Life of Frederick Douglass is unusual in that from the beginning to the end the focus has been shifted. In the beginning of the narrative Douglass seems to fulfill every stereotypical slavery theme. He is a young black slave who at first cannot read and is very naà ¯ve in understanding his situation. As a child put into slavery Douglass does not have the knowledge to know about his surroundings and the worldRead MoreRigoberta Menchu Literary Analysis871 Words   |  4 Pagescompelling narrative highlighting indigenous life during the Guatemalan Civil War. Since publication, her narrative has achieved world acclaim as it was awarded the Nobel Peace in 1992. Such acclaim, however, has incited critics to question her narrative, as does anthropologist David Stoll in Rigoberta Menchu and the Story of All Poor Guatemalans. Although the questioning of historical accounts is valid, David Stoll’s challenge of Menchu serves no purpose o ther than to discredit Menchus personal narrativeRead MoreThe Development of Identity1419 Words   |  6 Pagesidentity. â€Å"Identity† is currently used in two concurrent senses, one of which is â€Å"personal† and the other â€Å"social† (Schà ¶pflin). In the first aspect of identity, an individual’s identity is some distinctive trait, or a fixed category, that that person views as socially significant but more-or-less unchangeable. In other words, an identity is given to you. One of the key principles of developmental psychology, applicable to personal identity change, is continuity and discontinuity. In simple terms, this discussesRead MoreEssay about Baldwins Notes to a Native Son1712 Words   |  7 Pagesearth would blaze with the glory of fathers and sons.† This quotation by James Arthur Baldwin helps to bring about one of the main points of his essay, â€Å"Notes of a Native Son.† Baldwin’s composition was published in 1 955, and based mostly around the World War II era. This essay was written about a decade after his father’s death, and it reflected back on his relationship with his father. At points in the essay, Baldwin expressed hatred, love, contempt, and pride for his father, and Baldwin broke downRead MoreMoments and Time, Themes in the Narrative Beauty: When the Other Dancer Is the Self, by Alice Walker836 Words   |  3 Pages Time in Moments, Not Minutes When it comes to personal narratives, time is an important element. But what is time? Time can be defined in many different ways. When people think of time, the truth is that there are many definitions. Time can be seen as seconds, minutes, hours and days, but that’s not how everyone sees it. Time can also be defined by the moments in one’s life, not by the minutes that go past but by the significant times in a person’s life that defines lives. People can say, â€Å"WhenRead MoreEquiano s From The Interesting Narrative Of Olaudah Equiano980 Words   |  4 PagesOlaudah Equiano’s â€Å"From the Interesting Narrative of Olaudah Equiano† is written with the intent of ending the slave trade and aiding the abolitionists’ movement. His narrative tells his personal story of kidnapping, being sold into slavery and his experience in the middle passage. According to this account Olaudah Equiano grew up in Africa with a large family. He was captured and sold into slavery at age eleven. As an adult he became an opposing voice to slavery. This autobiography was published

Concept of Sustainable Development Free Essays

The concept of sustainable development is based on the rising environmental problems, socio-economic issues to do with poverty and inequality, and concerns about a healthy future for humanity. There is no definitive definition of sustainable development as it is thought of differently by many other people throughout the world. Sustainable Development is founded on the principle that mankind should advance without causing permanent damage to ecosystems and the resources they provide, how these resources are used, the processes that are used to get these resources and who has access to them. We will write a custom essay sample on Concept of Sustainable Development or any similar topic only for you Order Now All the above stated should be taken into consideration without posing risks to future generations. Sustainable development can be seen as as the connection between environment, society and economy, which is thought of being separate yet connected bodies. The economy is often given priority in policies and the environment is viewed as apart from humans. They are directly linked where the economy is dependent on society and the environment, and society is dependent on, and within the environment. Issues to do with society such as sustainability of communities and the maintenance of cultural diversity are often sidelined. Economics came to be the leading issue of human relations with economic growth, defined by increasing production, as the main priority. Changing the quality of growth, meeting important needs, merging environment and economics in decision making while emphasizing human development, participation in decisions and equality in benefits are things that can be done to eliminate poverty, meet human needs and ensure that all get a fair share of resources. Social justice today and in the future is a key component of the concept of sustainable development. This is seen as the key to humanity’s well-being and, through growth, poverty would be reduced. Most countries have no programs or policies that offer any real hope of narrowing the growing gap between rich and poor. This has caused damage to the environment which we depend on, with a downward spiral of poverty and environmental degradation. Environmental problems threaten people’s health, livelihoods and lives and threaten future generations. Global prosperity and human well-being can be achieved through increased global trade and industry. Green engineering is designing, building and manufacturing of products and processes including energy utilization and waste production that has the least negative impact on the environment possible. It includes all of the engineering disciplines, and is based off of current engineering design principles. Green Engineering can be defined as environmentally conscious attitudes, values, and principles, combined with science, technology, and engineering practice, all directed toward improving local and global environmental quality. It is usually used when referring to buildings, but it can be used for automobiles, lights or any other sort of system or device that requires engineering. Current design concepts in automobiles that are considered environmentally friendly are hybrid technologies; flex fuel vehicles, and even electricity. Though green engineering is somewhat more expensive, many countries, recognizing the value of this type of engineering by offering tax breaks and other incentives to the people and companies that incorporate its use. Green engineers need to understand how building materials, techniques and other components can be made in an environmentally-friendly way. This may include the use of solar powered appliances, especially water heaters, solar lights or windows and other design elements. Elements outside the building, such as the irrigation system and other landscaping features need to be taken into consideration also. It is likely that in the very near future we will be seeing â€Å"green cities† where cities are constructed to be healthy and environmentally friendly environments thus alleviating issues such as poverty in inequality within society. References 1. Abrahammson, K. V. 1997. Paradigms of sustainability. In S. Sorlin, ed. The road towards sustainability, A historical perspective, A sustainable Baltic Region, The Baltic University programme,Uppsalla University, pp. 30-35. 2. Hanna, S. Munasinghe, M. 1995. eds. Property rights in a social and ecological context, Case study and design apllications, The Beijer International Institute of Ecological Economics and the World Bank, Washington D. C. 3. OECD. 1997. Environmental indicators for agriculture, Paris. 4. Robinson, J. Tinker, J. 1995. Reconciling ecological, economic and social imperatives: Toward an analytical framework, SDRI Discussion Papers Series, 1995-1, Sustainable Development Institute. Vancouver, Canada. 5. Anastas, P. T. , and Zimmerman, J. B. , â€Å"Design through the Twelve Principles of Green Engineering†, Env. Sci. and Tech. , 37, 5, 94A-101A, 2003. How to cite Concept of Sustainable Development, Papers

Analyzing Demand In Healthcare

Question: Write an essay on Analyzing demand in healthcare. Answer: Analyzing demand in healthcare from the economist perspective starts with the different primary key terms in health economics these are ordered which refers to the services in healthcare that amounts to consumer desires at given price and income. Health care need relates to the measure and type of duty that efficiently and effectively improves health. Utilization is the number of different services that are consumed. I agree with the statement that doctors have generated demand in healthcare, essentially termed as a doctor's driven demand. The reason for this is if the physician creates the demand for his services at his own will, he could face a drop in the market of the consumer-physician ratio simply due to the increase of utilization of his services without lowering the cost. Increasing the number of the doctors density could result in the growth of the healthcare expenditure with no benefit to the patient. The governments have put in place measure in the supply of medical manpower or control on utilization as a counting strategy. If the price-output decisions of the doctor were affected by other external factors to determine demand, then increase in usage could be achieved by lowering the costs. In that way, the idea would be value by the patient but this cannot be economically viable it would also result in high health care expenditure. Physicians manipulate the patient's demand for services. Doctors always deny the existent that kind of power in exploiting for all personal gain. The doctors can actually manage the demand for their services. It has been observed that when the fee charges in hospitals are reduced and depressed, the per capital service utilization of the physicians tends to rise in partial or whole compensation of the lowered price. The per capita usage also tends to grow more with the increase in the physician-population ratio. Determinants of the demand and supply of healthcare Ill-health Ill- health is the primary determinant as the request for healthcare comes as a result of the need for health services. The medical care is irregular and cannot be predicted, and that makes medical claim different from all other commodities. The supply for the healthcare demand is met when there is the availability of the medical personnel or physicians; these situations make the health care application dependent on the doctors. The demand for the particular type of service produced by a given supplier affects the quantity of that service will to people for treatment purposes. Economic determinants These are the variables either direct or indirect cost that is incurred in the process of therapy. The total cost includes the pricing of the service to the consumer, the travel expenses, all the income lost during the period receiving the service, and the non-money cost which is the time required for the services. The price of treatment is an important determinant of the demand for healthcare services. This includes the direct cost of therapy such as the consultancy services given by the physicians, services delivered all which are aimed at utilization of health services. The price of health services can have resulted either in reducing at least on the goods which are the consumption of healthcare or choose to the other commodities or both the products. The change in the price of healthcare or medical services does not affect the demand. However in the shift to high price elasticity of demand for the medical services, there is a drop in the request of the medical service. The physical availability of the healthcare providers has an effect on the utilization of the medical services. The implication is that the consumer of the health services gives value to the time spent on the event of visiting the health facilities. The waiting time for the customer to get the medical services. It is viewed as the availability of the physicians and the efficiency of the health practitioner in this case. It is referred to as the opportunity cost of waiting time of the consumer to the supplier in the medical intensive care. The perception of need determinants This is concerned about the attitude of the individual consumer, the values and the taste of the services. The usefulness of the modern health treatment is one of the areas where the patient would focus on, the perceived severity of the illness, and the quality of health caregivers. At the physician provision of services, quality is taken as a key determinant as to the choice of the health care provider. The individual consumer perceives the quality, and the health professional has a different view on the same, which is essentially defined by the number of the medical staff, the presence of adequate drugs, a functional unit laboratory, the availability of power or electricity. These factors have a substantial positive impact on the demand for the medical services and all influences the choice of the medical health service provider. Regarding how useful medical treatment are efficient, all these depend on on with the individual cultural and psychological information towards a physicia n. Also, the level of education plays a part in the decision making of a patient on how the services in healthcare are to be delivered. This is evident in the practice of the patient-centered treatment in major hospital, this mode of treatment is only useful when the health professionals are offering their best quality services. The quality of health services can vary from an individual to another; this is because it has numerous views, including the direct effectiveness of the treatment to the patient, the cost imposed on the patient in the occasional visits. The side effects of the services given, the politeness of the healthcare provider that significantly affects the customer satisfaction, also the opening hours of the healthcare facilities and the time one waits to be served in the customers turn over. So going to the doctor demand must be driven by the kind of services enjoyed by the consumer which to them take as a medical necessity. The physicians make some quality improvements which reduces the demand for health care. For example in the high-quality care reduces the occasional visit hence the request for care reduces as that of quality increases. Individual income The preference and choice of the healthcare services is a major factor, in the microeconomic theory of consumer behavior. The health seeking behavior of a person is dependent on the income state of the individual. All consumers of health require some income to be able to pay the cost of the healthcare service. The access to the better facility come with extra charges, the increase in income leads to higher demand for health care services. For individuals with particular health status or conditions, the changes in the prices of medical affect the needs of the services. Health insurance and the demand for healthcare The insurance aims to reduce the variability in a person's income and pools risk with a large number of individuals. With this, the population can cater for the cost of healthcare. The doctors induced demand will be high as the people can access the healthcare utilization, and this tends to rise the demand for healthcare. All the money paid to the health insurance can get interested and indeed is paid out to the health services when the consumer gets sick. The health insurance would not be of importance if every person had average needs. The insurance makes it possible to obtain health services without going bankrupt. Due to the results of the uncertainty all health illness and medical expenditures are not predictable, the policies cover for hospitalizations, serious injuries, and other modern treatments that can be very expensive to pay as an individual patient. On the physicians end the demand for healthcare with being in his favor as the gains and benefits will be paid by the insu rance companies that covers the patients. The market for health insurance will be affected by various factors which include the probability of occurrence of the illness. Also the intensity of loss about income which is the cost of the disease, and lastly the price or premiums paid to the insurance companies increase in the prices results to fewer individual insure against a given event. Conclusions The demand for healthcare can vary considerably and has many dimensions. The major one has to do with the quality of services offered by the healthcare providers. The relate to the productivity of the healthcare service determined by the training of the doctor, the technology in place. So it's right to suggest that the earlier assumption that the physician the demand for healthcare is doctor driven because if the physicians sufficiently have the adequate requirements, then demand is motivated by the fulfillment of the activities as by medical necessity. References Cretin, S., N., Duan, A. P., Williams, X. Gu and Shi Y. (1988). The Modeling the Effects of Insurance on Health Utilization in China. Cropper, M. L.( 1977). Health, Investment in Health, and Occupational Choice. Journal of Political Economy 85(6): 127394. Dunlop, D. W., and Martins J. M.. (1995). An International Assessment of Health Care Financing: Lessons for Developing Countries. Economic Development Institute (EDI) Seminar Series. Washington, D.C.: World Bank. Gertler, P, and Jeffrey H. (1997). Strategies for Pricing Publicly Provided Health Services. Policy Research Working Paper (1762). World Bank, Washington, D.C. Manning, W. G, Joseph P. N, Naihua D, and Emmet B. K, Arleen L, and Susan M. M. (1987). Health Insurance and the Demand for Medical Care: Evidence from a Randomized Experiment. American Economic Review 77(3): 25177. Manski, C. and Daniel M (1981). Structural Analysis of Discrete Data with Econometric Applications. Cambridge, Massachusetts: MIT Press. McFadden, Daniel. (1981). Econometric Models of Probabilistic Choice. In C. Manski and D. McFadden, eds., Structural Analysis of Discrete Data with Econometric Applications. Cambridge, Massachusetts: MIT Press. Newhouse, J (1993). Free for All: Lessons from the RAND Health Insurance Experiment. Cambridge, Massachusetts: Harvard University Press. Phelps, C. E. (1992). Health Economics. New York: HarperCollins. Smith, M. C., and Garner, D. D. (1974). Effects of a Medicaid Program on Prescription Drug Availability and Acquisition. Medical Care 12(7): 57181. World Bank. (1993). World Development Report 1993. New York: Oxford University Press.

Analyzing Demand In Healthcare

Question: Write an essay on Analyzing demand in healthcare. Answer: Analyzing demand in healthcare from the economist perspective starts with the different primary key terms in health economics these are ordered which refers to the services in healthcare that amounts to consumer desires at given price and income. Health care need relates to the measure and type of duty that efficiently and effectively improves health. Utilization is the number of different services that are consumed. I agree with the statement that doctors have generated demand in healthcare, essentially termed as a doctor's driven demand. The reason for this is if the physician creates the demand for his services at his own will, he could face a drop in the market of the consumer-physician ratio simply due to the increase of utilization of his services without lowering the cost. Increasing the number of the doctors density could result in the growth of the healthcare expenditure with no benefit to the patient. The governments have put in place measure in the supply of medical manpower or control on utilization as a counting strategy. If the price-output decisions of the doctor were affected by other external factors to determine demand, then increase in usage could be achieved by lowering the costs. In that way, the idea would be value by the patient but this cannot be economically viable it would also result in high health care expenditure. Physicians manipulate the patient's demand for services. Doctors always deny the existent that kind of power in exploiting for all personal gain. The doctors can actually manage the demand for their services. It has been observed that when the fee charges in hospitals are reduced and depressed, the per capital service utilization of the physicians tends to rise in partial or whole compensation of the lowered price. The per capita usage also tends to grow more with the increase in the physician-population ratio. Determinants of the demand and supply of healthcare Ill-health Ill- health is the primary determinant as the request for healthcare comes as a result of the need for health services. The medical care is irregular and cannot be predicted, and that makes medical claim different from all other commodities. The supply for the healthcare demand is met when there is the availability of the medical personnel or physicians; these situations make the health care application dependent on the doctors. The demand for the particular type of service produced by a given supplier affects the quantity of that service will to people for treatment purposes. Economic determinants These are the variables either direct or indirect cost that is incurred in the process of therapy. The total cost includes the pricing of the service to the consumer, the travel expenses, all the income lost during the period receiving the service, and the non-money cost which is the time required for the services. The price of treatment is an important determinant of the demand for healthcare services. This includes the direct cost of therapy such as the consultancy services given by the physicians, services delivered all which are aimed at utilization of health services. The price of health services can have resulted either in reducing at least on the goods which are the consumption of healthcare or choose to the other commodities or both the products. The change in the price of healthcare or medical services does not affect the demand. However in the shift to high price elasticity of demand for the medical services, there is a drop in the request of the medical service. The physical availability of the healthcare providers has an effect on the utilization of the medical services. The implication is that the consumer of the health services gives value to the time spent on the event of visiting the health facilities. The waiting time for the customer to get the medical services. It is viewed as the availability of the physicians and the efficiency of the health practitioner in this case. It is referred to as the opportunity cost of waiting time of the consumer to the supplier in the medical intensive care. The perception of need determinants This is concerned about the attitude of the individual consumer, the values and the taste of the services. The usefulness of the modern health treatment is one of the areas where the patient would focus on, the perceived severity of the illness, and the quality of health caregivers. At the physician provision of services, quality is taken as a key determinant as to the choice of the health care provider. The individual consumer perceives the quality, and the health professional has a different view on the same, which is essentially defined by the number of the medical staff, the presence of adequate drugs, a functional unit laboratory, the availability of power or electricity. These factors have a substantial positive impact on the demand for the medical services and all influences the choice of the medical health service provider. Regarding how useful medical treatment are efficient, all these depend on on with the individual cultural and psychological information towards a physicia n. Also, the level of education plays a part in the decision making of a patient on how the services in healthcare are to be delivered. This is evident in the practice of the patient-centered treatment in major hospital, this mode of treatment is only useful when the health professionals are offering their best quality services. The quality of health services can vary from an individual to another; this is because it has numerous views, including the direct effectiveness of the treatment to the patient, the cost imposed on the patient in the occasional visits. The side effects of the services given, the politeness of the healthcare provider that significantly affects the customer satisfaction, also the opening hours of the healthcare facilities and the time one waits to be served in the customers turn over. So going to the doctor demand must be driven by the kind of services enjoyed by the consumer which to them take as a medical necessity. The physicians make some quality improvements which reduces the demand for health care. For example in the high-quality care reduces the occasional visit hence the request for care reduces as that of quality increases. Individual income The preference and choice of the healthcare services is a major factor, in the microeconomic theory of consumer behavior. The health seeking behavior of a person is dependent on the income state of the individual. All consumers of health require some income to be able to pay the cost of the healthcare service. The access to the better facility come with extra charges, the increase in income leads to higher demand for health care services. For individuals with particular health status or conditions, the changes in the prices of medical affect the needs of the services. Health insurance and the demand for healthcare The insurance aims to reduce the variability in a person's income and pools risk with a large number of individuals. With this, the population can cater for the cost of healthcare. The doctors induced demand will be high as the people can access the healthcare utilization, and this tends to rise the demand for healthcare. All the money paid to the health insurance can get interested and indeed is paid out to the health services when the consumer gets sick. The health insurance would not be of importance if every person had average needs. The insurance makes it possible to obtain health services without going bankrupt. Due to the results of the uncertainty all health illness and medical expenditures are not predictable, the policies cover for hospitalizations, serious injuries, and other modern treatments that can be very expensive to pay as an individual patient. On the physicians end the demand for healthcare with being in his favor as the gains and benefits will be paid by the insu rance companies that covers the patients. The market for health insurance will be affected by various factors which include the probability of occurrence of the illness. Also the intensity of loss about income which is the cost of the disease, and lastly the price or premiums paid to the insurance companies increase in the prices results to fewer individual insure against a given event. Conclusions The demand for healthcare can vary considerably and has many dimensions. The major one has to do with the quality of services offered by the healthcare providers. The relate to the productivity of the healthcare service determined by the training of the doctor, the technology in place. So it's right to suggest that the earlier assumption that the physician the demand for healthcare is doctor driven because if the physicians sufficiently have the adequate requirements, then demand is motivated by the fulfillment of the activities as by medical necessity. References Cretin, S., N., Duan, A. P., Williams, X. Gu and Shi Y. (1988). The Modeling the Effects of Insurance on Health Utilization in China. Cropper, M. L.( 1977). Health, Investment in Health, and Occupational Choice. Journal of Political Economy 85(6): 127394. Dunlop, D. W., and Martins J. M.. (1995). An International Assessment of Health Care Financing: Lessons for Developing Countries. Economic Development Institute (EDI) Seminar Series. Washington, D.C.: World Bank. Gertler, P, and Jeffrey H. (1997). Strategies for Pricing Publicly Provided Health Services. Policy Research Working Paper (1762). World Bank, Washington, D.C. Manning, W. G, Joseph P. N, Naihua D, and Emmet B. K, Arleen L, and Susan M. M. (1987). Health Insurance and the Demand for Medical Care: Evidence from a Randomized Experiment. American Economic Review 77(3): 25177. Manski, C. and Daniel M (1981). Structural Analysis of Discrete Data with Econometric Applications. Cambridge, Massachusetts: MIT Press. McFadden, Daniel. (1981). Econometric Models of Probabilistic Choice. In C. Manski and D. McFadden, eds., Structural Analysis of Discrete Data with Econometric Applications. Cambridge, Massachusetts: MIT Press. Newhouse, J (1993). Free for All: Lessons from the RAND Health Insurance Experiment. Cambridge, Massachusetts: Harvard University Press. Phelps, C. E. (1992). Health Economics. New York: HarperCollins. Smith, M. C., and Garner, D. D. (1974). Effects of a Medicaid Program on Prescription Drug Availability and Acquisition. Medical Care 12(7): 57181. World Bank. (1993). World Development Report 1993. New York: Oxford University Press.