Variables;"Model 1";"Model 2";"Model 3";"Model 4";"Model 5";"Model 6"
"Versts of railroad in 1894";"0.063*** (0.016)";"0.046*** (0.016)";"0.043*** (0.015)";"0.039*** (0.013)";"0.035*** (0.011)";"0.019* (0.010)"
"Blackearth region";;"38.065*** (13.090)";"42.753*** (12.755)";"31.105** (12.122)";"37.861*** (9.518)";"22.294 (14.443)"
"Versts of railroad in 1894 × Blackearth region";;;;;;"0.027 (0.019)"

"Grain yield (poods per desiatina)";;;"1.663*** (0.556)";"1.336** (0.610)";"1.532** (0.645)";"1.482** (0.667)"
"% arable of all land";;;;"0.953*** (0.226)";"0.982*** (0.235)";"0.978*** (0.231)"
"Number of workers in production per 1,000 citizens";;;;;"0.409* (0.240)";"0.420* (0.250)"
Constant;"42.486*** (8.868)";"29.294*** (7.910)";"–43.897* (25.382)";"–55.307** (26.575)";"–75.190** (29.007)";"–64.832** (31.389)"
;;;;;;
Observations;50;50;50;50;50;50
R-squared;0.208;0.378;0.457;0.586;0.655;0.663