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August 15, 2026 

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WEALTH OF NATIONS, THE: Officially titled "An Inquiry into the Nature and Causes of the Wealth of Nations", this book written by Adam Smith and published in 1776, is considered to be the foundation for the modern study of economics. The Wealth of Nations was the first to combine assorted economic discourse and analyses into a single book. One of its most important themes is the efficiency of free trade and market exchanges unrestricted by government that leads to macroeconomic full employment and microeconomic efficiency. The Wealth of Nations is one of the most famous books worldwide. It continues to provide economic insight over two hundred years after its initial appearance.

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MARGINAL EFFICIENCY OF INVESTMENT: The anticipated rate of return on a capital investment project undertaken by a business firm. Businesses typically compare the marginal efficiency of investment, abbreviated MEI, on physical capital with interest rate returns on financial capital when deciding to undertake an investment project. Because different investment projects have different returns, businesses often have a range of alternatives projects from which to choose. Combining all projects throughout the economy gives rise to an investment demand curve relating investment expenditures to the interest rate.

     See also | investment expenditures | business sector | capital | physical capital | financial capital | rate of return | investment demand curve | interest rate | internal rate of return |


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AVERAGE REVENUE PRODUCT

Total revenue generated per unit of a variable input, keeping all other inputs unchanged. Average revenue product, usually abbreviated ARP, is found by dividing total revenue by the variable input or by multiplying average physical product by average revenue. Average revenue product is a part of marginal productivity theory used to analyze the demand for productive inputs.

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RED AGGRESSERINE
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Today, you are likely to spend a great deal of time touring the new suburban shopping complex hoping to buy either a birthday gift for your uncle or a pair of red and purple designer socks. Be on the lookout for the last item on a shelf.
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Much of the $15 million used by the United States to finance the Louisiana Purchase from France was borrowed from European banks.
"We succeed in enterprises (that) demand the positive qualities we possess, but we excel in those (that) can also make use of our defects. "

-- Alexis de Tocqueville, statesman, author

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