Table 1.

Data sources and expected results (CHSY: China Health Statistical Yearbook; ISR: improved sanitation rate; CSY: China Statistical Yearbook).

Data Sources	Expected Results
CHSY (2006–2015) ISR provinciaL–Level data	Spatial auto-correlation and inter-provincial disparities among 30 provinces during the period 2006–2015;
CHSY (2015) ISR county-level data	Intra-provincial disparities of improved sanitation in 2015;
(1)CHSY (2006–2015) provinciaL–Level data: ISR and Centralized Water Supply rate, total investment of sanitation. (2)CSY (2006–2015) provinciaL–Level data: GDP per capita, rural residents’ expenditure, illiteracy rate of people older than 15, urbanization.	Spatial panel model analysis of 30 provinces during the period 2006–2015.