| Variables/Regressions | (9) | (10) | (11) | (12) | (13) | (14) | (15) | (16) |
| Dependent Variables |
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| Connect | X | X | X | X | X | X | X | X |
| Independent Variables |
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| Population | −0.0008762 (−0.08) |
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| GDP |
| 0.0012954 (0.71) |
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| GDP per capita |
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| 0.0026496*** (5.51) |
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| Share of world GDP |
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| 0.6302306 (0.58) |
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| Current account surplus/deficit |
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| 0.4759197 (1.04) |
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| Tariff preference margin |
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| −0.5884914 (−0.60) |
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| Imports and exports goods and services |
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| 0.1076188 (1.54) |
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| Services exports share of total |
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| −0.030123 (−0.20) |
| Constant | 33.421*** (10.60) | 32.69935*** (10.64) | 17.71784*** (4.84) | 32.73854*** (10.48) | 35.431*** (9.99) | 35.77589*** (7.15) | 24.8875*** (4.01) | 34.14052*** (6.74) |
| Observations | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| Adjusted R-squared | −0.0207 | −0.0101 | 0.3746 | −0.0138 | 0.0018 | −0.0132 | 0.0271 | −-0.0200 |