Which of the Following Contributed to the Increase in Income

question 134

Multiple Choice

Which of the following contributed to the increase in income inequality among families in the United States during the 1980s and 1990s?

• A) an increase in the highest marginal tax rates that forced high income earners to work more in order to maintain their income
• B) an increase in the proportion of both single-parent and dual-earner families
• C) a decrease in the size of the earnings differential between college graduates and high school graduates
• D) all of the above

---

Definitions:

Analogue Study

Research conducted in controlled conditions that simulates real-life scenarios to explore hypotheses about behavior or phenomena.

Learned Helplessness

A situation in which an individual is afflicted with a feeling of incapacity, originating from a significant trauma or consistent failure to accomplish goals.

Epidemiological

Pertaining to the study of the distribution and determinants of health-related states or events in specific populations, and the application of this study to control health problems.

Single-subject Experiment

A research design in which the subject serves as their own control, allowing researchers to observe effects before, during, and after the manipulation of an independent variable.