Low productivity in the U.S. appreciates the dollar in the foreign exchange market

A trade surplus exists if export spending is less than import spending

Indicate whether the statement is true or false

Economists use the term "ceteris paribus" to indicate that: a. the analysis is true for the individual but not for the economy as a whole

b. supply and demand are in balance. c. their conclusions are based on normative rather than positive economic analysis. d. other things are assumed to remain constant.