Now showing items 1-5 of 5

    • A visual test for a unit root: Geary's count of sign changes revisited 

      Honohan, Patrick; Geary, R. C. (Economic & Social StudiesDublin, 1996)
      Prompted by Geary's (1970) suggestion in a different context, the stationarity of a plotted time series can be assessed by simply counting the number of times the plot crosses the trend line linking the first and last ...
    • Determination of linear relations between systematic parts of variables with errors of observation the variances of which are unknown 

      Geary, R. C. (Economic & Social StudiesDublin, 1996)
      Given a sufficient number of instrumental variables significantly correlated with the investigational variables, consistent estimates of the coefficients of the linear relations can be determined (if they exist), without ...
    • Estimation of the parameter in the discrete "Taxi" problem, with and without replacement 

      Largey, Ann; Spencer, John E. (Economic & Social StudiesDublin, 1996)
      In the continuous uniform distribution [0,N], the Maximum Likelihood estimator of N is known to possess high mean square error for large samples. This paper examines this issue in the discrete case, without replacement ...
    • Geary's contiguity ratio 

      Unwin, Antony (Economic & Social StudiesDublin, 1996)
      Forty years ago Geary published a paper oil spatial statistics introducing the contiguity ratio, c, to measure spatial pattern. He discussed c not only as a direct measure but as a regression diagnostic for assessing ...
    • More about Geary and the "Taxi" problem 

      Conniffe, Denis; Geary, R. C. (Economic & Social StudiesDublin, 1996)
      Geary's treatment of the "taxi" problem was recently re-examined by Spencer and Largey (1993). This paper investigates the topic further, partly to place Geary's estimator in the context of more general methods and also ...