CETERIS PARIBUS LÀ GÌ

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What Is Ceteris Paribus?

Ceteris paribus, literally "holding other things constant," is a Latin phrase that is commonly translated inlớn English as "all else being equal." A dominant assumption in mainstream economic thinking, it acts as a shorthvà indication of the effect of one economic variable on another, provided all other variables remain the same.


Ceteris paribus is a Latin phrase that generally means "all other things being equal."In economics, it acts as a shorthvà indication of the effect one economic variable has on another, provided all other variables remain the same.Many economists rely on ceteris paribus to lớn describe relative tendencies in markets and to lớn build and kiểm tra economic models.In reality, one can never assume "all other things being equal."

Understanding Ceteris Paribus

In the fields ofeconomicsandfinance, ceteris paribus is often used when making arguments about cause và effect. An economist might sayraising theminimum wageincreasesunemployment, increasing the supply of money causes inflation, reducing marginal costs boosts economic profits for a company, or establishing rent control laws in a thành phố causes the supply of available housing to decrease. Of course, these outcomes can be influenced by a variety of factors, but using ceteris paribus allows all other factors lớn remain constant, focusing on the impact of only one.


Ceteris paribus assumptions help transform an otherwise deductive social science inlớn a methodologically positive "hard" science. It creates an imaginary system of rules và conditions from which economists can pursue a specific over. Put another way; it helps the economist circumvent human nature và the problems of limited knowledge.


Most, though not all, economists rely on ceteris paribus khổng lồ build & chạy thử economic models. In simple language, it means the economist can hold all variables in the Model constant and tinker with them one at a time. Ceteris paribus has its limitations, especially when such arguments are layered on top of one another. Nevertheless, it is an important & useful way lớn describe relative tendencies in markets.


Application of Ceteris Paribus

Suppose that you wanted to lớn explain the price of milk. With a little thought, it becomes apparent that milk costs are influenced by numerous things: the availability of cows, their health, the costs of feeding cows, the amount of useful l&, the costs of possible milksubstitutes, the number of milk suppliers, the cấp độ of inflation in the economy, consumer preferences, transportation, & many other variables. So an economist instead applies ceteris paribus, which essentially says if all other factors remain constant, a reduction in the supply of milk-producing cows, for example, causes the price of milk lớn rise.


As another example, take thelaws of supply và dem&. Economists say the law of demand demonstrates that ceteris paribus, more goods tkết thúc khổng lồ be purchased at lower prices. Or that, if dem& for any given product exceeds the product"s supply, ceteris paribus, prices will likely rise.


Since economic variables can only be isolated in theory và not in practice, ceteris paribus can only ever highlight tendencies, not absolutes.


Ceteris paribus is an extension of scientific modeling. The scientific method is built on identifying, isolating, & testing the impact of an independent variable on a dependent variable.


History of Ceteris Paribus

Two major publications helped move mainstream economics from a deductive social science based on logical observations and deductions inkhổng lồ an empirically positivist natural science. The first was Léon Walras" Elements of Pure Economics, published in 1874, which introducedgeneral equilibrium theory. The second was John Maynard Keynes" The General Theory of Employment, Interest, và Money published in 1936, which created modern macroeconomics.


In an attempt lớn be more like the academically respected "hard sciences" of physics and chemistry, economics became math-intensive sầu.Variable uncertainty, however,was a major problem; economics could not isolate controlled and independent variables for math equations. There was also a problem with applying the scientific method, which isolates specific variables & tests their interrelatedness khổng lồ prove sầu or disprove sầu a hypothesis.


Economics does not naturally lend itself toscientific hypothesis testing. In the field of epistemology, scientists can learn through logical thought experiments, also called deduction, or through empirical observation and testing, also called positivism. Geometry is a logically deductive sầu science. Physics is an empirically positive sầu science.


Unfortunately, economics and the scientific method are naturally incompatible. Noeconomisthas the power to lớn control all economic actors, hold all of their actions constant, and then run specific tests. No economist can even identify all of the critical variables in a given economy. For any given economic sự kiện, there could be dozens or hundreds of potential independent variables.


Enter ceteris paribus. Mainstream economists construct abstract models where they pretend all variables are held constant, except the one they want lớn kiểm tra. This style of pretending, called ceteris paribus, is the crux of general equilibrium theory.

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As economistMilton Friedmanwrote in 1953, "theory is to be judged by its predictive power for the class of phenomemãng cầu which it is intended to "explain."" By imagining all variables save oneare held constant, economists can transkhung relative sầu deductive market tendencies into lớn absolute controllable mathematical progressions. Human nature is replaced with balanced equations.


Benefits of Ceteris Paribus

Suppose an economist wants khổng lồ prove sầu a minimum wage causes unemployment or that easy money causes inflation. They could not possibly mix up two identical demo economies & introduce a minimum wage law or start printing dollar bills.


So the positive sầu economist, charged with testing their theories, must create a suitable framework for the scientific method, even if this means making very unrealistic assumptions. The economist assumes buyers và sellers areprice-takersrather thanprice makers.


The economist also assumes actors have perfect information about their choices since any indecision or incorrect decision based on incomplete information creates a loophole in the mã sản phẩm. If the models produced in ceteris paribus economics appear to make accurate predictions in the real world, the model is considered successful. If the models vày not appear lớn make accurate predictions, they are revised.


This can make positive sầu economics tricky; circumstances might exist that make one Model look correct one day but incorrect a year later. Some economists reject positivism và embrace deduction as the principal mechanism of discovery. The majority, however, accept the limits of ceteris paribus assumptions, lớn make the field of economics more like chemistry & less lượt thích philosophy.


Criticisms of Ceteris Paribus

Ceteris paribus assumptions are at the heart of nearly all mainstream microeconomic và macroeconomic models. Even so, some critics of mainstream economics point out that ceteris paribus gives economists the excuse to lớn bypass real problems about human nature.


Economists admit these assumptions are highly unrealistic, và yet these models lead khổng lồ concepts such as utility curves, cross elastiđô thị, và monopoly.Antitrustlegislation is actually predicated onperfect competitionarguments. TheAustrian school of economicsbelieves ceteris paribus assumptions have sầu been taken too far, transforming economics from a useful, logical social science into lớn a series of math problems.


Let"s go bachồng khổng lồ the example of supply & demand, one of the favorite uses of ceteris paribus. Every introductory textbook on microeconomics shows static supply và demvà charts where prices are given lớn both producers và consumers; that is, at a given price, consumers dem& and producers supply a certain amount. This is a necessary step, at least in this framework, so that economics can assume away the difficulties in theprice-discoveryprocess.


But prices are not a separate entity in the real world of producers and consumers. Rather, consumers & producers themselves determine prices based on how much they subjectively value the good in question versus the quantity of money for which it is traded.


Financial consultant Frank Shostak wrote that this supply-demvà framework is "detached from the facts of reality." Rather than solvingequilibriumsituations, he argued, students should learn how prices emerge in the first place. He claimed any subsequent conclusions or public policies derived from these abstract graphical representations are necessarily flawed.


Like prices, many other factors that affect the economy or finance are continuously in flux. Independent studies or tests may allow for the use of the ceteris paribus principle. But in reality, with something like thestoông xã market, one can never assume "all other things being equal." There are too many factors affecting stoông chồng prices that can và vì change constantly; you can"t isolate just one.


Ceteris Paribus vs. Mutatis Mutandis

While somewhat similar in assumption aspects, ceteris paribus is not to lớn be confused withmutatis mutandis, translated as "once necessary changes have sầu been made.” It is used khổng lồ acknowledge that a comparison, such as the comparison of two variables, requires certain necessary alterations that are left unsaid because of their obviousness.


In contrast, ceteris paribus excludes any & all changes except for those that are explicitly spelled out. More specifically, the phrase mutatis mutandis is largely encountered when talking about counterfactuals, used as a shorthvà to lớn indicate initial và derived changes that have sầu been previously discussed or are assumed to lớn be obvious.


The ultimate difference between these two contrasting principles boils down to correlation versus causation. The principle of ceteris paribus facilitates the study of the causal effect of one variable on another. Conversely, the principle of mutatis mutandis facilitates an analysis of the correlation between the effect of one variable on another, while other variables change at will.


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