USAirlines {AER} | R Documentation

## Cost Data for US Airlines

### Description

Cost data for six US airlines in 1970–1984.

### Usage

    data("USAirlines")

### Format

A data frame containing 90 observations on 6 variables.

firm

  factor indicating airline firm.

year

  factor indicating year.

output

  output revenue passenger miles index number.

cost

  total cost (in USD 1000).

price

  fuel price.

load

  average capacity utilization of the fleet.

### Source

Online complements to Greene (2003). Table F7.1.

http://pages.stern.nyu.edu/~wgreene/Text/tables/tablelist5.htm

### References

Greene, W.H. (2003). Econometric Analysis, 5th edition. Upper Saddle River, NJ: Prentice Hall.

### See Also

`Greene2003`

### Examples

    data("USAirlines")

    ## Example 7.2 in Greene (2003)
    fm_full <- lm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load + year + firm,
      data = USAirlines)
    fm_time <- lm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load + year,
      data = USAirlines)
    fm_firm <- lm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load + firm,
      data = USAirlines)
    fm_no <- lm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load, data = USAirlines)

    ## Table 7.2
    anova(fm_full, fm_time)
    anova(fm_full, fm_firm)
    anova(fm_full, fm_no)

    ## alternatively, use plm()
    library("plm")
    usair <- plm.data(USAirlines, c("firm", "year"))
    fm_full2 <- plm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load,
      data = usair, model = "within", effect = "twoways")
    fm_time2 <- plm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load,
      data = usair, model = "within", effect = "time")
    fm_firm2 <- plm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load,
      data = usair, model = "within", effect = "individual")
    fm_no2 <- plm(log(cost) ~ log(output) + I(log(output)^2) + log(price) + load,
      data = usair, model = "pooling")
    pFtest(fm_full2, fm_time2)
    pFtest(fm_full2, fm_firm2)
    pFtest(fm_full2, fm_no2)

    ## More examples can be found in:
    ## help("Greene2003")

[Package AER version 1.2-5 Index]