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Suppose you are interested in studying the impact of crime on property values.

1. All else equal, you would expect an increase in the violent crime rate to cause __________ in property value.

2. Suppose you run an ordinary least squares (OLS) regression of property value on violent crime rate. You get the following results:

\[ \hat{\text{value}} = 10 + 0.5 \cdot \text{crime} \]

The positive sign on the coefficient for crime implies that an increase in the violent crime rate actually increases property value. Why might you suspect this simple regression would yield biased results?

Answer :

Final answer:

The positive correlation in the OLS regression between violent crime rate and property value doesn't guarantee causality or influence. Biasing factors could be confounding variables such as police expenditures, unemployment levels, region, average age, and community size, or omitted variable bias due to not including factors also correlated with both crime rates and property values.

Explanation:

You asked if an increase in violent crime rate actually increases property value and raised concerns about the results of the ordinary least squares (OLS) regression analysis. The positive correlation identified by the OLS regression suggests that an increase in violent crime equates to an increase in property value.

However, the key points to consider here are causality and confounding variables. While the OLS analysis notes a relationship between crime rate and property values, it doesn't guarantee causality, meaning one does not necessarily influence the other. Second, the existence of confounding variables may bias the results. Factors such as unemployment levels, police expenditures, average age, region, and community size can all impact property values alongside crime rates.

Another factor that might lead to biased results in the regression is the phenomenon of omitted variable bias, which occurs when a variable that is correlated with both the independent and dependent variable is omitted from the analysis. It's important to consider other factors that may not have been included in your analysis. For instance, if areas with high crime rates also have higher levels of employment or other characteristics that might increase property values, failing to include these variables in your analysis could yield incorrect results.

Learn more about Regression Analysis here:

https://brainly.com/question/31873297

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