used.cars {spdep} | R Documentation

## US 1960 used car prices

### Description

The `used.cars` data frame has 48 rows and 2 columns. The data set includes a neighbours list for the 48 states excluding DC from poly2nb().

### Usage

    data(used.cars)

### Format

This data frame contains the following columns:

tax.charges
  taxes and delivery charges for 1955-9 new cars
price.1960
  1960 used car prices by state

### Source

Hanna, F. A. 1966 Effects of regional differences in taxes and transport charges on automobile consumption, in Ostry, S., Rhymes, J. K. (eds) Papers on regional statistical studies, Toronto: Toronto University Press, pp. 199-223.

### References

Hepple, L. W. 1976 A maximum likelihood model for econometric estimation with spatial series, in Masser, I (ed) Theory and practice in regional science, London: Pion, pp. 90-104.

### Examples

    data(used.cars)
    moran.test(used.cars$price.1960, nb2listw(usa48.nb))
    moran.plot(used.cars$price.1960, nb2listw(usa48.nb),
      labels=rownames(used.cars))
    uc.lm <- lm(price.1960 ~ tax.charges, data=used.cars)
    summary(uc.lm)
    lm.morantest(uc.lm, nb2listw(usa48.nb))
    lm.morantest.sad(uc.lm, nb2listw(usa48.nb))
    lm.LMtests(uc.lm, nb2listw(usa48.nb))
    uc.err <- errorsarlm(price.1960 ~ tax.charges, data=used.cars,
      nb2listw(usa48.nb), tol.solve=1.0e-13, tol.opt=.Machine$double.eps^0.3)
    summary(uc.err)
    uc.lag <- lagsarlm(price.1960 ~ tax.charges, data=used.cars,
      nb2listw(usa48.nb), tol.solve=1.0e-13, tol.opt=.Machine$double.eps^0.3)
    summary(uc.lag)
    uc.lag1 <- lagsarlm(price.1960 ~ 1, data=used.cars,
      nb2listw(usa48.nb), tol.solve=1.0e-13, tol.opt=.Machine$double.eps^0.3)
    summary(uc.lag1)
    uc.err1 <- errorsarlm(price.1960 ~ 1, data=used.cars,
      nb2listw(usa48.nb), tol.solve=1.0e-13, tol.opt=.Machine$double.eps^0.3)
    summary(uc.err1)

[Package spdep version 0.4-56 Index]