2.3 Sampling Method The sampling plan for the general public uses the Assisted Area Sampling “GPS Method.” incorporates population as a measure of size, stratification and PPS (Probabilities Proportional to Size). 2.4 Stratification Method For the purpose of allocating PSUs across all large regions with different levels of economic development, stratification based on 3 official division of regions in China（Coastal,11 will be taken as the provinces; Central, 8 provinces; Western,12 provinces) first step of the sampling process. In addition, we have taken into consider the disparity between rural and urban areas in China’s social development. In order to lower the disparity between sampling from urban and rural areas in order to fulfill the research goal, this project will do a second stratification based on urban and rural characteristics within the first strata. Therefore, there are 6 layers in total. In order to obtain a self-weighted sample, number of primary sampling units (PSUs) within each stratum is proportional to the population size of that stratum. Table 1. The population size of each stratum and their respective PSU The 18-70 Number Number The population of PSUs of PSUs population of Percentage PSUs of each that that Strata each strata, of total in fpc_psu strata, should were 2010 population each 2010 be chosen (person) strata (person) chosen 11 East Municipal 330383666 236757325 0.241 14.44 15 520 0.0288462 Districts 0.138 13 East county 189660000 135912876 8.29 8 366 0.0218579 21 Central Municipal 196183034 140587369 0.143 8.58 9 416 0.0216346 Districts 23 Central 0.190 260701152 186821909 11.40 11 478 0.0230126 county 31 West 0.102 Municipal 140102848 100399562 6.13 6 288 0.0208333 Districts 33 West 255360000 182994369 0.186 11.16 11 787 0.0139771 county 983473410 Total 1372390700 1 60 60 2855 0.021016
2.3 Sampling Method The sampling plan for the general public uses the “GPS Assisted Area Sampling Method.” incorporates population as a measure of size, stratification and PPS (Probabilities Proportional to Size). 2.4 Stratification Method For the purpose of allocating PSUs across all large regions with different levels of economic development, stratification based on 3 official division of regions in China（Coastal,11 provinces; Central, 8 provinces; Western,12 provinces) will be taken as the first step of the sampling process. In addition, we have taken into consider the disparity between rural and urban areas in China’s social development. In order to lower the disparity between sampling from urban and rural areas in order to fulfill the research goal, this project will do a second stratification based on urban and rural characteristics within the first strata. Therefore, there are 6 layers in total. In order to obtain a self-weighted sample, number of primary sampling units (PSUs) within each stratum is proportional to the population size of that stratum. Table 1. The population size of each stratum and their respective PSU Strata The population of each strata, 2010 (person) The 18-70 population of each strata, 2010 (person) Percentage of total population Number of PSUs that should be chosen Number of PSUs that were chosen PSUs in each strata fpc_psu 11 East Municipal Districts 330383666 236757325 0.241 14.44 15 520 0.0288462 13 East county 189660000 135912876 0.138 8.29 8 366 0.0218579 21 Central Municipal Districts 196183034 140587369 0.143 8.58 9 416 0.0216346 23 Central county 260701152 186821909 0.190 11.40 11 478 0.0230126 31 West Municipal Districts 140102848 100399562 0.102 6.13 6 288 0.0208333 33 West county 255360000 182994369 0.186 11.16 11 787 0.0139771 Total 1372390700 983473410 1 60 60 2855 0.021016
Report_SamplingFieldwork_EN.docx