Table 3

Parameter . | Pooled OLS model . | FEM . | REM . | |||
---|---|---|---|---|---|---|

Coefficient . | Std. error . | Coefficient . | Std. error . | Coefficient . | Std. error . | |

Constant | 7.57 × 10^{−1} | 1.07 × 10^{−2} | 7.59 × 10^{−1} | 2.47 × 10^{−2} | ||

PSize | 2.01 × 10^{−4} | 4.96 × 10^{−6} | 2.01 × 10^{−4} | 1.13 × 10^{−5} | ||

IReq | 1.17 × 10^{−2} | 3.54 × 10^{−3} | 1.23 × 10^{−2} | 2.80 × 10^{−3} | 1.23 × 10^{−2} | 2.80 × 10^{−3} |

PSize*IReq | 8.37 × 10^{−5} | 1.64 × 10^{−6} | 8.40 × 10^{−5} | 1.29 × 10^{−6} | 8.40 × 10^{−5} | 1.29 × 10^{−6} |

R^{2} | 0.250 | 0.074 | 0.084 | |||

p-value | 0.000 | 0.000 | 0.000 | |||

F-test for individual effects | <0.000 | |||||

Lagrange multiplier test | <0.000 | |||||

Hausman test | 0.068 | |||||

Theta | 0.829 |

Parameter . | Pooled OLS model . | FEM . | REM . | |||
---|---|---|---|---|---|---|

Coefficient . | Std. error . | Coefficient . | Std. error . | Coefficient . | Std. error . | |

Constant | 7.57 × 10^{−1} | 1.07 × 10^{−2} | 7.59 × 10^{−1} | 2.47 × 10^{−2} | ||

PSize | 2.01 × 10^{−4} | 4.96 × 10^{−6} | 2.01 × 10^{−4} | 1.13 × 10^{−5} | ||

IReq | 1.17 × 10^{−2} | 3.54 × 10^{−3} | 1.23 × 10^{−2} | 2.80 × 10^{−3} | 1.23 × 10^{−2} | 2.80 × 10^{−3} |

PSize*IReq | 8.37 × 10^{−5} | 1.64 × 10^{−6} | 8.40 × 10^{−5} | 1.29 × 10^{−6} | 8.40 × 10^{−5} | 1.29 × 10^{−6} |

R^{2} | 0.250 | 0.074 | 0.084 | |||

p-value | 0.000 | 0.000 | 0.000 | |||

F-test for individual effects | <0.000 | |||||

Lagrange multiplier test | <0.000 | |||||

Hausman test | 0.068 | |||||

Theta | 0.829 |

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