Constants in Economy

The article contains a polemic against the hypothesis that the social sciences do not formulate scientific laws, only historical generalization. Some of the economic laws are not the attributes of the laws of science, but these are isolated cases (Okun's law). Most of the same economic laws as natural laws is a idealization. This means that it is accurate only when counterfactual assumptions. Economic laws are carelessly formulated, since they are not written in the form of sentences that consist of predecessor and successor. Predecessor of law of demand is consumer behavior assumptions that tend to favor psychological condition of operation. Assumptions about the of law of demand can not be predecessor of the of law on financial markets. Say's Law does not apply to the labor market, but the market for goods and services. universality of Keynes theory is limited because of the assumption thesis about the marginal propensity to consume is less than one