The ____ is equal to the sum of the squares of the market shares of all the firms in an industry

The optimal amount of R&D spending for the firm occurs where its expected return is equal to the interest-rate cost-of-funds to finance it.

Indicate whether the statement is true or false.

Ethiopia provides a counterexample to the claim

A) central economic planning doesn't work well. B) nations are poor because they are subject to exploitation by nations with superior military power. C) a nation can move to the ranks of the wealthiest in the world with few natural resources. D) the rule of law is necessary for economic growth.