Answer Happy

2. Test if crime rates are different by year. 3. Is the effect of ave. prison sentences on crime statistically significant? 4. Find a confidence interval for percent young male in column 2.

'probability of arrest ?probability of conviction ?probability of prison sentenc avg. sentence, days police per capita =1 if in western N.C. =1 if in central N.C. =1 if in SMSA perc, minority, 1980 weekly wage, construction (1) (2) (3) crimes per person crimes per person crimes per person -0.0351 -0.0349 -0.0354 (0.00299) (0.00298) (0.00299) -0.00248 -0.00246 -0.00250 (0.000313) (0.000312) (0.000313) 0.0133 0.0143 0.0124 (0.00547) (0.00547) (0.00543) -0.000300 -0.000334 -0.000176 (0.000182) (0.000182) (0.000174) 2.731 2.711 2.676 (0.198) (0.197) (0.198) -0.0131 -0.0130 -0.0129 (0.00178) (0.00178) (0.00179) -0.00140 -0.00159 -0.00146 (0.00121) (0.00121) (0.00122) 0.0283 0.00477 0.00554 (0.00170) (0.0104) (0.0105) 0.00000433 0.00000277 0.00000765 (0.0000409) (0.0000408) (0.0000411) 0.00000441 0.00000419 0.00000313 (0.00000391) (0.00000390) (0.00000381) 0.0872 0.0934 0.0908 (0.0197) (0.0199) (0.0198) -0.000657 -0.000771 (0.00174) (0.00174) -0.00196 -0.00213 (0.00174) (0.00173) -0.00481 -0.00501 (0.00176) (0.00175) -0.00375 -0.00394 (0.00178) (0.00178) -0.00146 -0.00161 (0.00176) (0.00176) 0.000694 0.000445 (0.00175) (0.00175) 11.58 11.11 (5.057) (5.085) 0.0297 0.0293 0.0274 (0.00446) (0.00445) (0.00415) 630 630 630 0.618 0.621 0.611 percent young male =1 if year 82 =1 if year == 83 =1 if year == 84 =1 if year == 85 =1 if year == 86 =1 if year == 87 Urban*Police Per Capita Constant Observations R2 Standard errors in parentheses