Project Description and Background
The Edinburgh Solicitors Property Centre (http://www.espc.co.uk) has
quarterly time series for local house prices dating back to 1993. In
terms of time series modelling twelve years of quarterly data is a
relatively short series, particularly since degrees of freedom are
likely to be reduced by a considerable number of potential explanatory
variables and lagged variations of these. One expedient might be to
forecast Scottish house prices in general and use such prices as an
explanatory variable for Edinburgh prices. In this way the Scottish
prices would act as a conduit for other variables. The Nationwide
Building Society has regional quarterly series for house prices
(http://www.nationwide.co.uk/hpi/historical.htm) from 1973. The Office
of National Statistics provides free access to a large number of
potential explanatory time series
(http://www.statistics.gov.uk/statbase/tsdintro.asp).
What is involved?
The objective of this project would be to develop suitable interacting
models for predicting Scottish and Edinburgh house prices. The primary
basis of assessment would not be the production of an excellent model,
but demonstration of a correct and insightful methodology in producing
such a model. This last sentence bears reading several times; lucky
number crunching will avail little - regardless of the result - unless
accompanied by lucid and insightful commentary. However, neither will
clever commentary avail much if it is not evident that techniques have
been correctly executed. Examiners should be fully persuaded of mastery
of both techniques and their underlying principles.
The project would involve collecting data, learning SPSS and EXCEL,
examining a variety of forecasting models. These models would include
Winters exponential smoothing, various types of regression model,
seasonal ARIMA models, and transfer function models. The project report
would include a consideration of the various models examined in terms of
the statistics pertaining to each.
Skills Needed
The student may come to the project with suitable training in
statistical forecasting. Otherwise, in order to complete this project
the student would have to teach himself the material in the first 8
Chapters of Forecasting Methods and Applications (1998) Makridakis,
Wheelwright and Hyndman (http://go.to/forecasting). Altogether this
amounts to mastering a full university course as a preparation to
conducting the project analysis by self-instruction, and accordingly,
the amount of analysis required of the project would be more modest than
would be the case were such preparation not required. The student would
agree on a schedule of progress to be made on mastering the statistical
and forecasting material, and progress would be checked on the basis of
periodic assignments.
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