Table 2. Characteristics of potential... | Emerald Publishing

Table 2.

Characteristics of potential factors influencing cluster membership

Driver	Abbrev.	Minimum	Maximum	Mean	SD	CV	References
X1: Population density	PD	19.00	3,757.00	369.46	654.27	1.77	Hazam and Felsenstein (2007)
X2: Unemployment rate	UR	1.20	24.30	7.80	4.06	0.52	Lin et al. (2014) and Tomal (2019a)
X3: Average gross monthly salaries [PLN]	AS	3,183.34	8,121.08	4,142.14	561.24	0.14	Lee (2009) and Nistor and Reianu (2018)
X4: Entities included in the REGON register per 10,000 population	ER	524.00	2,440.00	965.27	280.34	0.29	Cellmer et al. (2020)
X5: Offences identified by the Police per 1,000 inhabitants	OP	7.38	71.78	18.41	8.44	0.46	Hazam and Felsenstein (2007) and Thaler (1978)
X6: Doctors per 10,000 population	DP	2.00	198.20	40.55	29.86	0.74	Rivas et al. (2019)

Driver	Abbrev.	Minimum	Maximum	Mean	SD	CV	References
X1: Population density	PD	19.00	3,757.00	369.46	654.27	1.77	Hazam and Felsenstein (2007)
X2: Unemployment rate	UR	1.20	24.30	7.80	4.06	0.52	Lin et al. (2014) and Tomal (2019a)
X3: Average gross monthly salaries [PLN]	AS	3,183.34	8,121.08	4,142.14	561.24	0.14	Lee (2009) and Nistor and Reianu (2018)
X4: Entities included in the REGON register per 10,000 population	ER	524.00	2,440.00	965.27	280.34	0.29	Cellmer et al. (2020)
X5: Offences identified by the Police per 1,000 inhabitants	OP	7.38	71.78	18.41	8.44	0.46	Hazam and Felsenstein (2007) and Thaler (1978)
X6: Doctors per 10,000 population	DP	2.00	198.20	40.55	29.86	0.74	Rivas et al. (2019)