22 A recent study analyzes the main determinants of violent crime rates in the states of USA in 2017. Next, you can find the description of variables in this research and the OLS estimation results obtained: Table 1.1. Variables Description Name Description vio violent crime rate (incidents per 100,000 member of the state population) unemp percent of state population that is unemployed educ percent of state population with university degree pmale percent of state population that is male, ages 10 to 29 pblack percent of state population that is black, ages 10 to 64 pcincome per capita personal income in the state, thousands of dollars density state population per square mile of land area, divided by 1000 Table 1.2. OLS estimates - The dependent variable is below each of the models Model (1) Model (2) Model (3) Model (4) vio vio log(vio) log(vio) const 20,140.973 19,342.811 0.181 0.177 (6,000.811) (5,881,012) (0.491) (0.392) unemp 6,118.933 6,007.403 0.144 0.139 (2,237.521) (2,113.321) (0.039) (0.055) educ -6,208.566 -6,114.622 -0.155 -0.156 (1,882.597) (1,652.711) (0.047) (0.066) pmale 7,467.358 7,196.554 0.116 0.117 (433.588) (388.172) (0.009) (0.014) pcincome 382.187 (155.505) density 122.978 (10.693) log(pcincome) 0.988 0.955 (0.302) (0.344) log(density) 0.092 0.091 (0.008) (0.009) pblack 0.003 (0.018) Sample Size 51 51 51 51 R-squared 0.397 0.483 0.555 0.576 Adj. R-squared 0.344 0.412 0.494 0.481 SSR (RSS) 3,447.627 1,964.446 12.024 12.838 Note: Standard Errors in parenthesis below each of the estimated coefficients