**DEA studies** |

Schefczyk (*SMJ* 1993). | A, B | OLS regression | N = 15; cross section | (1) Aircraft capacity, (2) operating costs, (3) nonflight assets | (1) Passenger-related revenue, (2) nonpassenger revenue | Airlines | 0.878 | 0.097 |

Howard and Miller (*AMJ* 1993). | C | N/A | N = 443; cross section | 14 baseball performance indicators | Players' salary | Major league baseball players | N/A | N/A |

Cummins, Weiss, and Zi (*Mgmt Sci* 1999) | A, C | OLS regression | N = 417 (pooled); 10 years panel | (1) Labor, (2) business services, (3) debt capital, (4) equity capital | (1) Present value of losses, (2) total invested assets | Insurers | 0.901 (pooled) | – |

Majumdar (*SMJ* 1998) | C | N/A | N = 39. Cross section | (1) Total number of switches, (2) total number of access lines, and (3) total number of employees | (1) Local revenues, (2) toll revenues, and (3) other revenues | Telecom firms | 0.903 | 0.104 |

Majumdar and Venkataraman (*SMJ* 1998) | B | Tobit regression | N = 40. 5-year panel | (1) Number of switches, (2) number of lines, and (3) number of employees | (1) Local revenues, (2) toll revenues, and (3) access and misc. revenues | Telecom firms | 5.12 | 1.34 |

Majumdar and Marcus (*AMJ* 2001) | A | Tobit regression | N = 150, cross section | (1) Production expenses, (2) transmission expenses, (3) distribution expenses, (4) the total number of employees, (5) amount of purchased power | (1) Total sales, (2) dispositions of energy in megawatt hours | Electric utility firms | 0.78 | .158 |

Thursby and Thursby (*Mgmt Sci* 2002) | C | N/A | N = 64, from 1993 to1997 (balanced) | (1) Faculty size, (2) research funds, (3) number of full-time equivalent personnel | Number of patents | Universities | N/A | N/A |

Durand and Vargas (*SMJ* 2003) | A | ancova and mancova | N = 162. Cross section | (1) Total fixed assets; expenditures in (2) R&D, (3) marketing, (4) education | (1) Gross profits, (2) sales | Printing, auto parts, chemical firms | 0.552 | 0.253 |

**SFA studies** |

Delmas and Tokat (*SMJ* 2005) | A | Tobit regression | N = 707 (pooled); 4-year panel | (1) Labor cost, (2) plant value, (3) production expenses, (4) transmission expenses, (5) distribution expenses, (6) sales, (7) admin. and general expenses, (8) electricity purchases | (1) Low-voltage sales (2) high-voltage sales (3) sales for resale | Electric utility firms | 0.86 | 0.18 |

Delmas, Russo, and Montes-Sancho (*SMJ* 2008) | B | OLS regression | N = 177; 3-year panel | Same as above | (1) Low-voltage sales, (2) high-voltage sales, (3) sales for resale | Electric utility firms | 0.926 | 0.09 |

Delmas and Montes-Sancho (*SM*J 2010) | B | Two-stage logit model | N = 132; 6-year panel | Same as above | (1) Low-voltage sales, (2) high-voltage sales, (3) sales for resale | Electric utility firms | 0.88 | 0.15 |

SFA studies |

Miller and Parkhe (*SMJ* 2001) | C | SFA | N = 1300; 7-year panel | (1) Total loans, (2) earning assets, (3) labor, (4) physical capital, (5) funds and deposits | Profits | Banks | N/A | N/A |

Dutta, Narasimhan, and Rajiv (*SMJ* 2005) | C | SFA | N = 64; 9-year panel | (1) Cumulative R&D expenditure, (2) cumulative marketing expenditure | R&D patent counts weighted with citations | Semi-conductor firms | N/A | N/A |

Lieberman and Dhawan (*Mgmt Sci* 2005) | C | SFA | N = 11; 32-year panel | (1) Employee, (2) capital | Economic value-added | Auto producers | N/A | N/A |

Knott and Posen (*SMJ* 2005) | B | SFA (cost efficiency model) | 170,859 firm–year observations over 14 years | (1) Labor, (2) physical capital, (3) mortgage loans, (4) nonmortgage loans, (5) investment securities | Total costs | Banks | 0.81 | N/A |

Wu and Knott (*Mgmt Sci* 2006) | B | SFA (cost efficiency model) | Same as above. | Same as above | Total costs | Banks | 0.81 | N/A |

Knott, Posen, and Wu (*Mgmt Sci* 2009) | A | SFA (cost efficiency model) | Same as above. | Same as above | Total costs | Banks | 0.81 | N/A |