From: The impact of agglomeration economies on hospital input prices
Type of intermediate medical service (CPT code) | Urinalysis without microscopy (81003) | Urine test for early renal disease or diabetes (82043) | Test for alpha-fetoprotein levels (82105) | Another hepatic function panel (82150) |
---|---|---|---|---|
 | (1) | (2) | (3) | (4) |
Total Number of Hospital Beds (100Â s) | 0.155** | 0.507*** | 0.469 | 0.316** |
 | (2.55) | (2.63) | (1.60) | (2.22) |
Medical Lab Employment (100 s) | −0.524*** | −1.667*** | −1.633* | −1.100*** |
 | (-2.75) | (-2.76) | (-1.78) | (-2.47) |
Population Density (1,000Â s per Square Mile) | 0.090*** | 0.134 | 0.244 | 0.221*** |
 | (3.06) | (1.41) | (1.60) | (3.22) |
Area (1,000 s of Square Miles) | −0.020 | −0.052 | 0.271 | −0.059 |
 | (-0.53) | (-0.43) | (-1.43) | (-0.66) |
Average Hospital Size (100 s of Beds) | −0.403*** | −1.291*** | 0.980 | −1.315*** |
 | (-2.62) | (-2.70) | (-1.40) | (-3.72) |
Demographic Controlsa | YES | YES | YES | YES |
Year Trend | YES | YES | YES | YES |
Region FE | YES | YES | YES | YES |
Year Trend × Region FE | YES | YES | YES | YES |
No. of Observations | 6332 | 6159 | 5509 | 6146 |
Root MSE | 3.640 | 11.032 | 7.315 | 7.406 |
First-stage F-statistics | 13.017 | 12.345 | 13.452 | 11.190 |
Wooldridge Robust Score Test | 14.920 | 15.643 | 3.603 | 11.183 |