Table 2 DID regression results: Monument designation impacts.

(A and B) Robust standard errors, two-way clustered at state and year level, in parentheses. (A) Regression includes individual establishment fixed effects, state by year fixed effects, and industry by year fixed effects (using two-digit SIC codes). (B) Regressions include individual ZCTA fixed effects and state by year fixed effects. *P < 0.10; **P < 0.05; ***P < 0.01.

A
ln(jobsjsjt)
Treatment—establishments in ZCTAs
within 25 km of monument
0.0039
(0.003)
No. of observations3,077,838
No. of establishments369,758
R20.922
B
ln(establishmentszjt)ln(jobszjt)ln(wagezjt)
Treatment—ZCTAs within 25 km of monument0.099**
(0.020)
0.085**
(0.025)
−0.0014
(0.018)
No. of observations10,89210,89210,885
No. of zip codes435435435
R20.9740.9580.638