Table 1 Variables and functional relationships in the system dynamics model of the sustainable development of the maternity insurance fund after the merger of the two insurance systems
No. | Variable name | Meaning | Type | Variable expression and assignment | Units |
|---|---|---|---|---|---|
1 | Maternity insurance average level of treatment | Average entitlement level of maternity insurance | Auxiliary variables | 3 351 × time − 6.7203e+006 | RMB |
2 | Average wage | Average payment base of maternity insurance | Auxiliary variables | 3 514 × time − 7.0354e+006 | RMB |
3 | Birth rate | Births | Auxiliary variables | 0.00937 | Rate |
4 | Births | Number of births | Rate variables | Number of insured × birth rate | Person/year |
5 | Death rate | Mortality | Auxiliary variables | 0.007 | Rate |
6 | Deaths | Number of deaths | Rate variables | Number of insured × death rate | Person/year |
7 | Number of beneficiaries | Maternity insurance’s number of beneficiaries | Auxiliary variables | Births − births × 0.011236 + second child comprehensive | Persons |
8 | Final time | System length | Auxiliary variables | 2027 | Years |
9 | Maternity insurance fund balance | Maternity insurance base | Status variables | INTEG (fund income − fund expenditure, 2.761e+009) | RMB/year |
10 | Maternity insurance fund expenditure | Expenditure of maternity insurance fund | Rate variables | Maternity insurance average level of treatment × number of beneficiaries + total incentive payments | RMB/year |
11 | Maternity insurance fund income | Income of maternity insurance fund | Rate variables | Payment base × payment rate | RMB/year |
12 | INITIAL TIME | System start time | Auxiliary variables | 2017 | Years |
13 | New insured people | Number of new insured per year of maternity insurance | Auxiliary variables | Assigning values based on different scenarios | Persons |
14 | Maternity insurance payment base | Payment base of maternity insurance | Auxiliary variables | Average wage × number of insured | RMB |
15 | Maternity insurance payment rate | Contribution rate of maternity insurance | Auxiliary variables | 0.005 | Rate |
16 | Second child comprehensive | Total number of additions per year | Auxiliary variables | Assigning values based on different scenarios | Persons |
17 | Number of insured | Number of insured persons | Status variables | INTEG (births − deaths + new insured people, 1.51032e+007) | Person/year |
18 | Maternity insurance and medical insurance coordination fund | Maternity and health insurance consolidated fund | Status variables | INTEG (total income − total expenditure, 1.1394e+011) | RMB |
19 | Medical insurance fund balance | Accumulated balance of the medical insurance fund | Status variables | INTEG (medical insurance income − medical insurance expenditure, 1.11179e+011) | RMB |
20 | Medical insurance income | Income volume of the medical insurance fund | Rate variables | 7.89833e+009 × time − 1.58369e+013 | RMB/year |
21 | Medical insurance expenditure | Medical insurance fund expenditure volume | Rate variables | 7.01367e+009 × time − 1.40673e+013 | RMB/year |
22 | Total expenditure | Total expenditure of the maternity and health insurance pool | Rate variables | Maternity insurance fund expenditure + medical insurance expenditure | RMB/year |
23 | Total income | Total income of the maternity and health insurance pool | Rate variables | Maternity insurance fund income + medical insurance income | RMB/year |
24 | Total incentive payments | Total fertility incentive payments | Auxiliary variables | Average incentive payments × second child comprehensive (or all newborns) | RMB |
25 | Average incentive payments | Average incentive payment on fertility | Auxiliary variables | Assigning values based on different scenarios | RMB |