Beta regression results – testing the education-FLFP relationship in Sri Lanka (2017–2024)
| Variable | Model 1 (Linear) | Model 2 (Quadratic) | Model 3 (Temporal) | Model 4 (Full model) |
|---|---|---|---|---|
| Constant | −0.197 (0.199) | −0.158* (0.066) | −0.183 (0.196) | −0.143*** (0.036) |
| Education (linear) | 4.964*** (0.482) | 4.961*** (0.170) | 4.485*** (1.343) | 4.691*** (0.163) |
| Education (quadratic) | – | 2.826*** (0.148) | – | 2.823*** (0.083) |
| Education (cubic) | – | – | – | 1.003*** (0.083) |
| Year fixed effects | Yes | Yes | Yes | Yes |
| Education × year | – | – | Yes | Yes |
| Pseudo R² | 0.735 | 0.96 | 0.736 | 0.992 |
| Log-likelihood | 36.352 | 75.482 | 36.454 | 105.437 |
| AIC | −52.704 | −128.963 | −38.908 | −172.874 |
| BIC | −35.815 | −110.385 | −10.197 | −140.785 |
| N | 40 | 40 | 40 | 40 |
| Variable | Model 1 (Linear) | Model 2 (Quadratic) | Model 3 (Temporal) | Model 4 (Full model) |
|---|---|---|---|---|
| Constant | −0.197 (0.199) | −0.158 | −0.183 (0.196) | −0.143 |
| Education (linear) | 4.964 | 4.961 | 4.485 | 4.691 |
| Education (quadratic) | – | 2.826 | – | 2.823 |
| Education (cubic) | – | – | – | 1.003 |
| Year fixed effects | Yes | Yes | Yes | Yes |
| Education × year | – | – | Yes | Yes |
p-values are based on wild cluster bootstrap inference at the education-category level (Five clusters; B = 999), which is appropriate for few-cluster settings. Standard errors (in parentheses) are cluster-robust at the education level. All models use orthogonal polynomial specifications for education and include year fixed effects. ***p < 0.001, **p < 0.01, *p < 0.05
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