airfare

Description

Wooldridge Source: Jiyoung Kwon, a former doctoral student in economics at MSU, kindly provided these data, which she obtained from the Domestic Airline Fares Consumer Report by the U.S. Department of Transportation. Data loads lazily.

Usage

data('airfare')

Format

A data.frame with 4596 observations on 14 variables:

• year: 1997, 1998, 1999, 2000

• id: route identifier

• dist: distance, in miles

• passen: avg. passengers per day

• fare: avg. one-way fare, $

• bmktshr: fraction market, biggest carrier

• ldist: log(distance)

• y98: =1 if year == 1998

• y99: =1 if year == 1999

• y00: =1 if year == 2000

• lfare: log(fare)

• ldistsq: ldist^2

• concen: = bmktshr

• lpassen: log(passen)

Notes

This data set nicely illustrates the different estimates obtained when applying pooled OLS, random effects, and fixed effects.

Used in Text: pages 506-507, 581

Source

https://www.cengage.com/cgi-wadsworth/course_products_wp.pl?fid=M20b&product_isbn_issn=9781111531041

Examples

 str(airfare)