What is Budget constraints in Microeconomics?

What are the advantages of the United Kingdom joining the European Union? What is the policy of countries that extends their economic control over distant land? Is Economic optimization is futile? What have been the results of improved agricultural practices? Apache economic systems? What is the difference between a demand graph and a supply graph? How has geography influenced the economies of the Caribbean countries? Who exposed Rockefeller's Standard Oil Company's unethical practices that allowed it to become a monopoly? Compressing information and being as economical as possible when asked to provide more than simple factual information will? Why does the average cost curve fall at the initial stage then rise again? Was the Egyptian economy based on farming? What is the relationship between public administration and economics? What is the similarities between perfect competitive monopoly monopolistic competition and oligopoly? Raising the duty on a Tariff would negatively affect what section is the most? Where is opportunity cost on a production possibility frontier? How do wants and need and the basic economic problem drive economic growth? What effect do these fines have on consumers? If Cabell Corp bonds pay an annual coupon rate of 10 percent and the investors required rate of return is now 8 percent on these bonds what will be the price? Why beggars exist? What economic theory encourages growth in the amount of goods and services available?

What is Budget constraints in Microeconomics?