dairyspain: Data on Spanish dairy farms

dairyspainR Documentation

Data on Spanish dairy farms

Description

This dataset contains six years of observations on 247 dairy farms in northern Spain, drawn from 1993-1998. The original data consist in the farm and year identifications, plus measurements on one output (i.e. milk), and four inputs (i.e. cows, land, labor and feed).

Format

A data frame with 1,482 observations on the following 29 variables.

FARM

Farm identification.

AGEF

Age of the farmer.

YEAR

Year identification.

COWS

Number of milking cows.

LAND

Agricultural area.

MILK

Milk production.

LABOR

Labor.

FEED

Feed.

YIT

Log of MILK.

X1

Log of COWS.

X2

Log of LAND.

X3

Log of LABOR.

X4

Log of FEED.

X11

1/2 * X1^2.

X22

1/2 * X2^2.

X33

1/2 * X3^2.

X44

1/2 * X4^2.

X12

X1 * X2.

X13

X1 * X3.

X14

X1 * X4.

X23

X2 * X3.

X24

X2 * X4.

X34

X3 * X4.

YEAR93

Dummy for YEAR = 1993.

YEAR94

Dummy for YEAR = 1994.

YEAR95

Dummy for YEAR = 1995.

YEAR96

Dummy for YEAR = 1996.

YEAR97

Dummy for YEAR = 1997.

YEAR98

Dummy for YEAR = 1998.

Details

This dataset has been used in Alvarez et al. (2004). The data have been normalized so that the logs of the inputs sum to zero over the 1,482 observations.

Source

http://pages.stern.nyu.edu/~wgreene/Econometrics/oldPanelDataSets.htm

References

Alvarez, A., C. Arias, and W. Greene. 2004. Accounting for unobservables in production models: management and inefficiency. Econometric Society, 341:1–20.

Examples


str(dairyspain)
summary(dairyspain)

sfaR documentation built on July 9, 2023, 6:58 p.m.