Housing the Poor in the Developing World: Methods of Analysis, Case Studies, and Policy

By A. Graham Tipple; Kenneth G. Willis | Go to book overview

9

Regression analysis

Determinants of overcrowding and house condition in Ghanaian housing markets

Kenneth G. Willis


INTRODUCTION

Frequency and cross-tabulation tables have limitations in their ability to analyse housing problems. Suppose a sample of houses consisted of 180 observations, and the purpose is to investigate the effect of income, household size and tenure type on housing consumption. By cross-tabulation, the sample could be divided into, say, five income groups, four household size groups and three tenure groups. Means could be computed from each cell to estimate the effect of these variables on demand. However, with 5×4×3=60 cells, there would only be an average of three observations per cell, and although some would have five or six, many would be empty and most would have only one or two observations, making means meaningless or extremely unreliable (Malpezzi, 1984b). Regression techniques get round this problem, in addition to that of errors in results and interpretations which can occur in cross-tabulations through the inappropriate grouping of survey data (Upton, 1989).

Regression analysis can be broadly defined as the analysis of the statistical relationship among variables. There are many forms of regression analysis but a basic distinction can be made between forms which use continuous data and those which use discrete data. The classical regression model is based upon a continuous dependent (response or endogenous) variable (Y) which is dependent upon a number of independent (predictor or exogenous) variables (X1, X2, X3...., Xk). Such a model implies cause and effect; a given change in X1 will cause Y to change by a specific amount; but it does not prove cause and effect. It really stresses the probabilistic association between the two variables. Indeed instrumentalism argues that variables and models should be chosen which provide the best predictive results (since this is the primary purpose of a theory) rather than selecting those based on deductive logic or causal theory (Boland, 1979).

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Housing the Poor in the Developing World: Methods of Analysis, Case Studies, and Policy
Table of contents

Table of contents

  • Title Page iii
  • Contents v
  • Figures vii
  • Tables ix
  • Preface xv
  • 1 - Introduction to Housing Analysis and an Overview 1
  • 2 - Participant Observation 16
  • 3 - Cultural Change Analysis 35
  • 4 - Time Series Analysis 62
  • Notes 80
  • 5 - Comparative Analysis 81
  • 6 - Analysis of Government Mortgage Records 96
  • 7 - Ratio Analysis 113
  • 8 - Discriminant Analysis 126
  • 9 - Regression Analysis 143
  • 10 - Econometric Analysis 169
  • Notes 188
  • 11 - Contingent Valuation 189
  • 12 - Discounted Cash Flow Analysis 208
  • 13 - Cost-Benefit Analysis 234
  • 14 - Methods of Analysis and Policy 258
  • Bibliography 262
  • Index 279
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