Page 214 - Contributed Paper Session (CPS) - Volume 6

CPS1892 Yang Xinhong
Table 1 Classification of economic units and "NOF" survey subject

Note: "NOF" amount refers to the economic amount of operating capital that economic units raise through
commercial credit (that are credit and lending between enterprises), folk usury, social fund-raising and
private borrowing Judgment about "NOF" amount is a preliminary judgment.
The main contents of the survey are the operation status, financing
channels and financing scale of self-employed households, mainly inquiring
into the turn of capital and the proportion of "NOF" in financing operating
capital. In order to enhance the reliability of self-employed households'
answers, Shenzhen Gold and Jewelry Industry Association, Shenzhen Service
and Trade Association and Shenzhen Mobile Phone Association were selected
to survey their membership scale, overall operation status and relevant
empirical data. Self-employed households were surveyed using the "Self-
employed Household Operating and Financing Questionnaire" and industry
associations were surveyed using the "Shenzhen Industry Development and
Financial Activities Questionnaire". The survey-period index was 2015, and the
time-point index was the end of 2015.
2.2 Survey Methods and Parameter Estimation
2.2.1 Survey Methods

The three-stage stratified systematic sampling is adopted in the survey,
which requires the samples to be representative of strata. Large sample
sampling (n 2 30) is applied within strata, and sample statistics can be used to
calculate parameters within strata.
The "big self-employed households" and "the third national economic
census" self-employed household data base, which was held by Shenzhen
Statistical Bureau on September 30, 2016, was taken as sampling box. All self-
employed households within Shenzhen are divided into two strata, namely
"big self-employed households" and "general self-employed households
For each stratum of "big self-employed households", including the "gold
and jewelry wholesale", "flower retail", "mobile phone wholesale" and "other
big self-employed households ", all units are ranked according to the size of
operating income, and then systematic (equidistant) sampling is adopted to
extract samples. "General self-employed households" are ranked by the
sequence numbers in the "the third national economic census" data base, and
then systematic sampling is adopted to extract samples. See Table 2 for the
unit number in relevant strata and the sample size.

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