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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: J Urban Econ. 2012 Mar;71(2):219–229. doi: 10.1016/j.jue.2011.11.002

Table 2.

Estimates of the Association between (log) Wage in Principal Nursing Position of US-trained Nurses and (log) Number of Nurses

Log Wages All States Excluding CA, FL, TX States >5% Foreign Population
OLS No Demand Variables OLS Demand Variables IV No Demand Variables IV Demand Variables IV No Demand Variables IV Demand Variables IV No Demand Variables IV Demand Variables
Log Number of Nurses −0.161*** (0.035) −0.091*** (0.037)
Instrument: 4-Year Lag Log Number Foreign-trained Nurses −0.016 (0.106) 0.071 (0.122) 0.019 (0.114) 0.088 (0.139) 0.214 (0.232) 0.085 (0.186)
Instrument: 4- and 8-Year Lags Log Number Foreign-trained Nurses −0.039 (0.109) 0.065 (0.121) −0.003 (0.112) 0.083 (0.138) 0.201 (0.211) 0.083 (0.186)
Over ID Test: Coefficient, (T-statistic), and [p-value] on 8-Yr Lag Log Num. Foreign-trained Nurses −0.002 [0.415] −0.002 [0.472] −0.001 [0.686] −0.001 [0.782] −0.001 [0.874] 0.005 [0.274]
Instrument: 4-Year Lag Log Number Foreign-trained Nurses by Year −0.161** (0.065) −0.091 (0.092) −0.227*** (0.061) −0.205*** (0.093) 0.115 (0.160) 0.029 (0.128)
Instrument: 4-year lag Log Number Foreign Nurses by Year by Region −0.243 (0.168) −0.182*** (0.063) −0.255*** (0.096) −0.184*** (0.062) −0.224 (0.146) −0.184 (0.268)

Number of Observations 122796 122796 109220 69709
Mean Wage 20.54 20.54 20.22 21.82

Notes: Figures in each cell are based on a single regression. Each regression includes controls for: respondent’s age, education, gender, whether white, marital status, years since received nursing license, year and state effects, state unemployment rate, per-capita income, proportion elderly, proportion black, population growth (4-year change), hospital admissions per-capita (and its square) and outpatient visits per capita (and its square). Regressions are weighted by individual weight. Murphy-Topel standard errors that account for clustering at state-year level are in parentheses.

**

0.01<p=<0.05,

***

p=<0.01.