Questions: What is the unit of analysis in a "meta-analysis?" (Hint: It's is not a "micro" unit.) - Each empirical study published previously on the topic of interest - individuals - Neighborhoods - Cities

The answer is: Each empirical study published previously on the topic of interest.

Explanation:

• Each empirical study published previously on the topic of interest: This is the correct answer. In a meta-analysis, the unit of analysis is the individual empirical studies that have been conducted on a particular topic. Meta-analysis involves systematically reviewing and statistically combining the results of these studies to draw broader conclusions.

• Individuals: This is incorrect. While individual participants are the units of analysis in primary research studies, in a meta-analysis, the focus is on the studies themselves rather than the individual participants within those studies.

• Neighborhoods: This is incorrect. Neighborhoods might be units of analysis in certain types of sociological or geographical studies, but not in a meta-analysis.

• Cities: This is incorrect. Similar to neighborhoods, cities could be units of analysis in urban studies or geographical research, but they are not the focus in a meta-analysis.

In summary, a meta-analysis aggregates data from multiple empirical studies to provide a more comprehensive understanding of a research question, making each empirical study the unit of analysis.