project, Econometrics

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QM2 Econometric Project
As part of the course requirements you have to undertake an econometric
evaluation of an economic issue using data that you have gathered either
from the host of data sets now available on the web, or that you have
assembled yourself from data published in journals or in official sources. The
data set must contain a minimum of 3 variables, (one dependent variable
and at least 2 right hand side variables to be added to a constant term). You
should concentrate on estimating a multiple (rather than simple) regression
model.
You should have a minimum of 50 observations in your regressions.
Anything less will be penalised heavily.
The model should be a causal one, (ie the right hand side variables should
explain the dependent variable, not the other way round). This also means, for
example, that you should not estimate identities like a national accounts
model of the form Y=C+I+G+(X-M). This is an accounting identity and so the
coefficients shouldn’t be anything other than one, barring measurement error).
The econometric results should include a thorough statistical evaluation using
the full range of (relevant) diagnostic tests highlighted during the course. Do
not use tests just for the sake of it. There are no marks to be gained by doing
countless irrelevant tests. Only use tests that are relevant to the type of data
and economic relationship you are trying to estimate.
This project accounts for 20% of the overall mark for this course and should
be completed by Monday 29th April 2013.
In order for the project to be marked at all, you must provide a disk containing
i) the data you have used ii) the Stata output log containing your regression
output and iii) a copy of the project on disc along with a hard copy of the
project.
You should aim for a maximum of 2,500 words or around 8 pages of text, 2
to 3 tables of results and 2 or 3 figures (not including the log file)
Please provide a word count on your cover page.
Project Objectives
The idea is to choose an economic issue which you find interesting, outline a
theory and a set of testable hypotheses that follow on from that. Then test the
theory empirically using the tools you have learned during this term’s course.
The dissertation should read something like a typical article that you would
find in a (non-technical) academic journal like the Journal of Economic
Perspectives or the May Papers & Proceedings volumes of the American
Economic Review, (the collection of back issues are in the library).
Choosing a Topic
The most important thing is to choose a project that is feasible, that can be
finished within one month from start to finish and still allow you time to work
on your other subjects. This means confining your topic to a simple issue.
Also it is a good idea to choose a topic that you are interested in, rather than
one you fell you ought to do. The more you are interested the easier the
project will be. Do not write the theoretical part of your project until you know
you have data that can be used to test your hypotheses.
One good way to find a topic to study is to read the economic pages of the
broadsheet newspapers and/or academic articles summarised in overview
journals like the
Journal of Economic Perspectives
or
Journal of Economic Literature
both of which are in the library. In addition there are specialist journals, (and
therefore more technical), such as the
American Economic Review, Economic Journal, Quarterly Journal of
Economics, Journal of Labor Economics, Journal of Industrial
Economics, Journal of Development Economics, Journal of Finance
which should all be good sources of current issues concerning academic
economists
Data
There are now a variety of data sources on the internet.
Many UK macroeconomic statistics, (inflation, unemployment, gdp etc), can
be downloaded from the Office for National Statistics website
http://www.ons.gov.uk/ons/index.html
The
bized site also contains access to official UK data alongside company
account data and some international data.
http://www.bized.co.uk/learn/economics/index.htm
You
can find stock market data at the Stock Exchange’s web site
http://www.londonstockexchange.com/
or
from yahoo
http://uk.finance.yahoo.com/q/hp?s=%5EFTSE
A
very good source of international data both cross section and time series is
given at the Resources for Economists website
http://rfe.org/showCat.php?cat_id=2
and
also the Statlib website
http://lib.stat.cmu.edu
and
also the university of Michigan
http://www.lib.umich.edu/govdocs/stforeig.html
The
World Bank also has data
http://worldbank.org
and
there are lots of data and ideas at
http://www.economagic.com/ and http://pwt.econ.upenn.edu
The
library also has a useful link to some sites
For those of you interested in working with cross section data. I have put 2
different UK cross section data sets on the course web site
GHS_project.dta – which has information on wages, health, smoking,
drinking, education and other socio-demographic characteristics of individuals
taken from the General Household Survey
(you can find a codebook giving details of the variables at
https://www.esds.ac.uk/findingData/snDescription.asp?sn=5804
Food_project.dta
- which has information on household spending on various
consumer items taken from the Expenditure & Food Survey
(you can find a codebook giving details of the variables at
http://www.data-archive.ac.uk/findingData/snDescription.asp?sn=5375#doc )
You will of course have to choose which variables to model and give
economic reasons for your choice.
These are just guides to help you. You may, of course, find your own data.
Analysis
Ideally your project should look and be structured like an article you can find
in any of the economic journals listed above. You are strongly advised to read
some articles to get a feel for how they are presented.
So your project should include the following sections:
Theoretical Framework
Set out the economic theory underlying your project and use it to specify a
model and the resulting hypotheses to be tested. Set out your prior
expectations of the likely signs and magnitudes of the coefficients. Discuss
any econometric problems you expect to encounter.
Data
Discuss the sources for your data. Give the exact definition of variables (in a
Table in an appendix) and sample period, Describe the main features of the
data using a table of sample means and their standard errors. Graph the
trends in the dependent and, perhaps, the independent variables. Comment
on the main trends/features.
Econometric Method
Outline the econometric techniques used to estimate your model, (eg.
ordinary least squares with corrections for heteroskedasticty/autocorrelation).
You need to convince the reader that you have made the right choice of
estimation technique. Evaluate the model using the set of (relevant)
diagnostic tests covered in the lectures. (Eg, Box-Cox, Ramsey Reset,
Forecasting). Do NOT report the results of the tests one after another like a
shopping list. Report the tests for each model at the bottom of a column of
estimates. (Again read a journal article for hints on presentation).
Results
Outline your results in tabular form, (check with a journal if you are unsure as
to how to present your results). The Stata command “outreg” will help
considerably with you inputting the results in tabular form. State whether your
hypotheses are accepted or rejected. Comment on the results and on any
diagnostic tests you have used.
Conclusion
Give an overview of your hypotheses and main results
References
Always list the data sources and articles that you may have read at the end of
the discussion. Tables and Figures should come after the references.

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