Variable | Description |

tech_ | Technical efficiency at time t |

L. tech_ | Technical efficiency at time t-1 |

log_laodong_ | Natural logarithm of labor |

log_von_ | Natural logarithm of fixed capital (assets) |

age | Years of operations |

age 2 | Years squared of operations |

age 3 | Years quadatic of operations |

equity_to_assets | Equity to total assets |

roa_ | Return on assets |

roe_ | Return on equity |

own | Dummies for types of ownership Case 1: 1 if domestic firm, 0 if FDI firm (variable: grouptwo) Case 2: 0 if domestic, 1 if FDI with 100%, 2 if SOE with FDI, and 3 if PTE with FDI (variables: group1_, group2_, group3_, group4_,) |

wage_ | Wages per person in a firm |