The Relationship between Chronic Non-Communicable Diseases of Fish Farm Household Members and Production Efficiency: The Case of Ghana
Abstract
:1. Introduction
2. Methodology
2.1. Data Source
2.2. Variable Selection and Measurement
2.3. Empirical Model Specification
3. Results and Discussions
3.1. Description Statistics
3.2. Frequency Distribution of Technical Efficiency Scores
3.3. Determinants of Technical Efficiency
3.4. Heterogeneous Impact of Household Members’ NCDs on Production Efficiency by Gender Composition
3.5. Robustness Check Results
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Appendix A
IV | Outcome Variable | Statistics |
---|---|---|
Health distance | Household members’ NCDs | = 43.34 **; p-value = 0.027 |
Health distance | Fish farm efficiency | F-value= 0.56; p-value = 0.258 |
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Variables | Description | Mean | Std. Dev. |
---|---|---|---|
Input/output variables | |||
Output | Total output per hectare in the past 12 months | 6602.35 | 4701.10 |
Pond size | Total fish farm land in hectares (Ha) | 0.49 | 0.78 |
Labor | Person-days/Ha | 12.32 | 5.46 |
Feed cost | Feed cost (GHS 1000/capita) | 1.45 | 2.85 |
Other costs | Total cost of other inputs (GHS 1000/capita) | 1.12 | 2.71 |
Characteristics | |||
Household NCDs | Number of household members with NCDs | 2.93 | 1.65 |
Male NCDs | Number of male household members with NCDs | 3.14 | 27.84 |
Female NCDs | Number of female household members with NCDs | 2.73 | 28.87 |
Access to credit | 1, if the household has access to credit, and 0 otherwise | 0.52 | 0.46 |
Access to extension service | 1, if the household has access to extension services, and 0 otherwise | 0.63 | 0.48 |
Off-farm employment | 1, if the household have off-farm employment, and 0 otherwise | 0.74 | 0.51 |
Education | Respondent’s years of formal education | 10.90 | 4.51 |
Cooperative member | 1, if the respondent is a member of a cooperative, and 0 otherwise | 0.66 | 0.47 |
Age | Respondent’s age | 40.13 | 7.72 |
Experience | Years of farming experience | 11.75 | 2.43 |
Household size | Total household size | 5.29 | 1.13 |
Health distance | Distance from the respondent’s resident to the nearest health facility (kilometers) | 1.53 | 0.48 |
Efficiency Score | VRS | CRS | SE |
---|---|---|---|
0.00–0.09 | 0 | 4 | 0 |
0.10–0.19 | 0 | 44 | 14 |
0.20–0.29 | 7 | 23 | 22 |
0.30–0.39 | 12 | 19 | 29 |
0.40–0.49 | 23 | 15 | 23 |
0.50–0.59 | 21 | 6 | 19 |
0.60–0.69 | 15 | 2 | 5 |
0.70–0.79 | 24 | 7 | 8 |
0.80–0.89 | 13 | 5 | 7 |
0.90–0.99 | 7 | 3 | 1 |
1 | 9 | 3 | 3 |
Total DMUs | 131 | 131 | 131 |
Min. | 0.286 | 0.071 | 0.186 |
Max. | 1 | 1 | 1 |
Mean | 0.791 | 0.413 | 0.493 |
SD | 0.115 | 0.273 | 0.314 |
Characteristics | Mean | Std. Dev | p-Value |
---|---|---|---|
Number of household members with NCDs | |||
High number of NCDs | 0.745 | 0.043 | 0.0007 |
Low number of NCDs | 0.837 | 0.162 | |
Cooperative member | |||
Member | 0.805 | 0.103 | 0.0084 |
Non-member | 0.777 | 0.176 | |
Years of farming experience | |||
Low experience | 0.769 | 0.108 | 0.0022 |
High experience | 0.813 | 0.090 | |
Access to credit | |||
Have access to credit | 0.819 | 0.147 | 0.0004 |
Do not have access to credit | 0.763 | 0.103 | |
Access to extension services | |||
Have access to extension services | 0.799 | 0.122 | 0.0461 |
Do not have access to extension services | 0.783 | 0.034 | |
Off-farm employment | |||
Access to off-farm work | 0.771 | 0.072 | 0.0012 |
Non-access to off-farm work | 0.811 | 0.110 |
VRS | |||
---|---|---|---|
Variables | Tobit Model | IV Tobit | Marginal effect |
Household members with NCDs | −0.0145 (0.0135) * | −0.2738 (0.0248) | −0.2101 (0.0226) ** |
Access to credit | 0.0470 (0.0275) ** | 0.0253 (0.0251) | 0.0127 (0.0151) ** |
Access to extension services | 0.0511 (0.0021) * | 0.0239 (0.0158) | 0.0159 (0.0045) * |
Off-farm employment | −0.0241 (0.0120) * | −0.0756 (0.0237) | −0.0693 (0.0163) * |
Education | 0.0321 (0.0698) | 0.0362 (0.0327) | 0.0227 (0.0145) |
Cooperative member | 0.0221 (0.0162) | 0.0451 (0.0313) | 0.0341 (0.0182) * |
Age | 0.0077 (0.0055) | 0.0094 (0.0021) | 0.0066 (0.0038) |
Age2 | −0.0001 (0.0000) * | −0.0001 (0.0000) | −0.0001 (0.0000) |
Experience | 0.0479 (0.0126) *** | 0.0261 (0.0172) | 0.0210 (0.0143) *** |
Household size | 0.0063 (0.0043) | 0.0077 (0.0042) | 0.0006 (0.0009) * |
Constant | 1.1407 (0.0212) | 1.1447 (2.1012) | |
Regions | Yes | Yes | Yes |
Instrumental variables | No | Yes | Yes |
Endogenous Wald | 67.31 *** | 67.31 *** | |
Observation | 131 | 131 | 131 |
Variables | Model 1 | Model 2 | Model 3 |
---|---|---|---|
Female members with NCDs | −0.0677 (0.1036) *** | −0.1004 (0.1042) *** | −0.1851 (0.1244) *** |
Male members with NCDs | −0.0251 (0.0261) * | −0.0981 (0.0261) * | −0.0890 (0.0249) |
Control variables | No | No | Yes |
Regional dummies | No | Yes | Yes |
Instrumental variables | Yes | Yes | Yes |
Wald | 76.66 *** | 76.07 *** | 77.34 *** |
Variables | Model 1 (IV Probit) | Model 2 (2SLS) |
---|---|---|
Household members with NCDs | −0.1513 (0.0774) *** | −0.1901 (82.0103) *** |
Control variables | Yes | Yes |
Regional dummies | Yes | Yes |
Instrumental variables | Yes | Yes |
Wald | 63.27 *** | 65.17 *** |
Observation | 131 | 131 |
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Ankrah Twumasi, M.; Asante, D.; Brako, J.N.; Ding, Z.; Jiang, Y. The Relationship between Chronic Non-Communicable Diseases of Fish Farm Household Members and Production Efficiency: The Case of Ghana. Int. J. Environ. Res. Public Health 2023, 20, 4175. https://doi.org/10.3390/ijerph20054175
Ankrah Twumasi M, Asante D, Brako JN, Ding Z, Jiang Y. The Relationship between Chronic Non-Communicable Diseases of Fish Farm Household Members and Production Efficiency: The Case of Ghana. International Journal of Environmental Research and Public Health. 2023; 20(5):4175. https://doi.org/10.3390/ijerph20054175
Chicago/Turabian StyleAnkrah Twumasi, Martinson, Dennis Asante, Jesse Nuamah Brako, Zhao Ding, and Yuansheng Jiang. 2023. "The Relationship between Chronic Non-Communicable Diseases of Fish Farm Household Members and Production Efficiency: The Case of Ghana" International Journal of Environmental Research and Public Health 20, no. 5: 4175. https://doi.org/10.3390/ijerph20054175