Table 1. Predicting receiving a letter... | Emerald Publishing

Table 1.

Predicting receiving a letter from Gregory

	(1)	(2)
Sample	Italy	Europe
Sea access	–0.035	0.058
River access	0.087	0.097**
Soil quality	–0.161	–0.018
Elevation	0.058	0.078
Ruggedness	–0.064	–0.116**
Roman road	–0.053	0.153***
Etruscan	0.094
Dist. to Rome	0.078	–0.184***
Dist. to Brenner Pass	0.150
Ln(pop.size in 1000)	0.263*	0.222***
Urban potential	0.223+	–0.092
Bishop	0.275**	0.103**
Battles, 800–1073	–0.044	–0.050
Adj. R²	0.22	0.20
N	121	793

	(1)	(2)
Sample	Italy	Europe
Sea access	–0.035	0.058
River access	0.087	0.097**
Soil quality	–0.161	–0.018
Elevation	0.058	0.078
Ruggedness	–0.064	–0.116**
Roman road	–0.053	0.153***
Etruscan	0.094
Dist. to Rome	0.078	–0.184***
Dist. to Brenner Pass	0.150
Ln(pop.size in 1000)	0.263*	0.222***
Urban potential	0.223+	–0.092
Bishop	0.275**	0.103**
Battles, 800–1073	–0.044	–0.050
Adj. R²	0.22	0.20
N	121	793

Note(s):

Estimated using OLS. Standardized beta coefficients: +p < 0.10, *p < 0.05, **p < 0.01, ***p < 0.001