According to your textbook, words refer to concepts rather than to tangible objects.

About how many crusaders took part in the crusaders

Which sentences describes a cycle of dependency? a. aid harms the local economy creating the need for more aid. b. aid improves infrastructure and creates more wealth and more good infrastructure. c. aid programs become more reliable over time so people can depend on them. d. no answer is correct

What is the rule relating the ratio of marginal utility to prices of two goods at the optimal choice? explain why, if this rule does not hold, the choice cannot be utility-maximizing.