A tax that takes a larger proportion of income from the poor rather than the rich is what kind of tax?

The authors of the Comparative Political Analysis titled

"Institutions as the Main Cause of Development and Underdevelopment" use the ___________ method of comparative analysis. a. many-cases b. case study c. comparative-cases d. statistical

Failure to rule out an effect that might be due to events that occur during a study introduces

A) additional dependent variables. B) a type of researcher bias. C) the confounding effect of history. D) a threat to statistical validity.