Commoning of territorial heritage and tools of participated sustainability for the production and enhancement of agro-environmental public goods

Agricultural and Food Economics

Table 3 Allocation of the sample units in the layers. Inverse-proportional stratified sampling

Strata	Municipalities	Resident population	W_h	n_h	N/N_h	w_h	n_h1
0–5	12	28.356	0.17	46	5.89	0.29	77
5–10	3	18.360	0.11	30	9.09	0.44	119
10–30	4	57.106	0.34	92	2.92	0.14	38
30–100	1	63.153	0.38	102	2.64	0.13	35
	20	166.975			20.55		269

Data on the total resident population refer to January 01, 2017; extrapolation data of June 15, 2017 by Istat —municipal resident population by sex year of birth and marital status. Source: our processing on Istat data
W_h weight of the population residing in the center amplitude class with respect to the provincial population, n_h number of interviews to be performed in the center amplitude class, N resident provincial population, N_h total resident population in the center amplitude class, w_h weight of the units to be sampled in the center amplitude class with respect to the total sample, n_h1 number of interviews to be performed in the center amplitude class