stata stata

Using Stata for Principles of Econometrics

Lee C. Adkins, R. Carter hill


Table of contents


Chapter 1 - Introducing Stata

  • 1.1 Starting Stata
  • 1.2 The opening display
  • 1.3 Exiting Stata
  • 1.4 Stata data files for Principles of Econometrics
    • 1.4.1 A working directory
    • 1.4.2 Data definition files
  • 1.5 Opening Stata data files
    • 1.5.1 The use command
    • 1.5.2 Using the toolbar
    • 1.5.3 Using files on the Internet
    • 1.5.4 Locating POE files on the Internet
  • 1.6 The variables window
  • 1.7 Describing the data and obtaining summary statistics
  • 1.8 The Stata help system
    • 1.8.1 Using keyword search
    • 1.8.2 Using command search
    • 1.8.3 Opening a dialog box
  • 1.9 Stata commands syntax
    • 1.9.1 Syntax of summarize
    • 1.9.2 Learning syntax using the review window
  • 1.10 Saving your work
    • 1.10.1 Copying and pasting
    • 1.10.2 Using a log file
    • 1.10.3 Viewing a log file
    • 1.10.4 Translating a log file to a text file
    • 1.10.5 Using Stata commands for log files
  • 1.11 Using the data browser
  • 1.12 Using Stata graphics
    • 1.12.1 Histograms
    • 1.12.2 Scatter diagrams
  • 1.13 Using Stata do-files
  • 1.14 Creating and managing variables
    • 1.14.1 Creating (generating) new variables
    • 1.14.2 Using the expression builder
    • 1.14.3 Dropping or renaming a variable
    • 1.14.4 Using arithmetic operators
    • 1.14.5 Using Stata math functions
  • 1.15 Using Stata density functions
    • 1.15.1 Cumulative distribution functions
    • 1.15.2 Inverse cumulative distribution functions
  • 1.16 Using and displaying scalars
    • 1.16.1 Example of standard normal cdf
    • 1.16.2 Example of t-distribution tail-cdf
    • 1.16.3 Example of computing percentile of the standard normal
    • 1.16.4 Example of computing percentile of the t-distribution
  • 1.17 A scalar dialog box
    Key terms
    Chapter 1 Do-file

Chapter 2 - Simple linear regression

  • 2.1 The flood expenditure data
    • 2.1.1 Starting a new problem
    • 2.1.2 Starting a log file
    • 2.1.3 Opening a Stata data file
    • 2.1.4 Browsing and listing the data
  • 2.2 Computing summary statistics
  • 2.3 Creating a scatter diagram
    • 2.3.1 Enhancing the plot
  • 2.4 Regression
    • 2.4.1 Fitted values and residuals
    • 2.4.2 Computing an elasticity
    • 2.4.3 Plotting the fitted regression line
    • 2.4.4 Estimating the variance of the error term
    • 2.4.5 Viewing estimated variances and covariances
  • 2.5 Using Stata to obtain predicted values
  • 2.6 Saving the Stata data file and ending the session
    Key Terms
    Chapter 2 Do-file

Chapter 3 - Interval Estimation and Hypotheses Testing

  • 3.1 Interval estimates
    • 3.1.1 Critical values from the t-distribution
    • 3.1.2 Creating an interval estimate
  • 3.2 Hypothesis tests
    • 3.2.1 Right tail test of significance
    • 3.2.2 Right tail test of an economic hypothesis
    • 3.2.3 Left tail test of an economic hypothesis
    • 3.2.4 Two tail test of an economic hypothesis
  • 3.3 P-values
    • 3.3.1 P-value test of a right tail test
    • 3.3.2 P-value test of a left tail test
    • 3.3.3 P-value test of a two tail test
    • 3.3.4 P-values in Stata output
  • Key terms
    Chapter 3 Do-file

Chapter 4 - Prediction, Goodness-of-Fit and Modeling Issues

  • 4.1 Least squares prediction
    • 4.1.1 Editing the data
    • 4.1.2 Estimate the regression and obtain post-estimation results
    • 4.1.3 Creating the prediction interval
  • 4.2 Measuring goodness-of-fit
    • 4.2.1 Correlations and R2
  • 4.3 The effects of scaling and transforming the data
    • 4.3.1 The reciprocal functional form
    • 4.3.2 Editing graphs
    • 4.3.3 The linear-log model
  • 4.4 Analyzing the residuals
    • 4.4.1 The Jarque-Bera test
    • 4.4.2 Chi-square distribution critical values
    • 4.4.3 Chi-square distribution p-values
  • 4.5 Another empirical example
    • 4.5.1 Examining the data
    • 4.5.2 Estimating and checking the linear relationship
    • 4.5.3 Estimating and checking a cubic equation
  • 4.6 Estimating a log-linear wage equation
    • 4.6.1 The log-linear model
    • 4.6.2 Calculating wage predictions
    • 4.6.3 Constructing wage plots
    • 4.6.4 Generalized R2
    • 4.6.5 Prediction intervals in the log-linear model
  • Key Terms
    Chapter 4 Do-file

Chapter 5 - Multiple Linear Regression

  • 5.1 Big Andy’s burger barn
  • 5.2 Prediction
  • 5.3 Sampling precision
  • 5.4 Confidence intervals
  • 5.5 Hypothesis tests
  • 5.6 Goodness-of-fit
    Key Terms
    Chapter 5: Do-file

Chapter 6 - Further Inference in the Multiple Regression Model

  • 6.1 The F-test
  • 6.2 Testing the significance of the model
  • 6.3 An extended model
  • 6.4 Testing some economic hypotheses
    • 6.4.1 Significance of advertising
    • 6.4.2 Optimal advertising
  • 6.5 Nonsample information
  • 6.6 Model specification
    • 6.6.1 Omitted variables
    • 6.6.2 Irrelevant variables
    • 6.6.3 Choosing the model
  • 6.7 Poor data, collinearity and insignificance
    Key Terms
    Chapter 6 Do-File

Chapter 7 - Nonlinear Relationships

  • 7.1 Nonlinear Relationships
    • 7.1.1 Summarize data and estimate regression
    • 7.1.2 Calculate marginal effect
    • 7.1.3 Plotting wage-experience profile
  • 7.2 Dummy variables
    • 7.2.1 Creating dummy variables
    • 7.2.2 Using tabulate
    • 7.2.3 Estimating a dummy variable regression
    • 7.2.4 Testing the significance of the dummy variables
    • 7.2.5 Further calculations
  • 7.3 Applying dummy variables
    • 7.3.1 Interactions between qualitative factors
    • 7.3.2 Adding regional dummies
    • 7.3.3 Testing the equivalence of two regressions
    • 7.3.4 Estimating separate regressions
  • 7.4 Interactions between continuous variables
  • 7.5 Dummy variables in log-linear models
    Key Terms
    Chapter 7 Do-file

Chapter 8 - Heteroskedasticity

  • 8.1 The nature of heteroskedasticity
  • 8.2 Using the least squares estimator
  • 8.3 The generalized least squares estimator
    • 8.3.1 Transforming the model
    • 8.3.2 Estimating the variance function
    • 8.3.3 A Heteroskedastic partition
  • 8.4 Detecting Heteroskedasticity
    • 8.4.1 Residual plots
    • 8.4.2 The Goldfeld-Quandt test
    • 8.4.3 Testing the variance function
    • 8.4.3a The White test
  • Key Terms
    Chapter 8 Do-file

Chapter 9 - Dynamic Models, Autocorrelation, and Forecasting

  • 9.1 Lags in the error term: autocorrelation
  • 9.2 Area response for sugar
  • 9.3 Estimating an AR(1) model
    • 9.3.1 Least squares and HAC standard errors
    • 9.3.2 Nonlinear least squares
    • 9.3.3 A more general model
  • 9.4 Detecting autocorrelation
  • 9.5 Autoregressive models
  • 9.6 Finite distributed lags
  • 9.7 Autoregressive distributed lag models
    Appendix
    Key Terms
    Chapter 9 Do-file

Chapter 10 - Random Regressors and Moment Based Estimation

  • 10.1 Least squares with simulated data
  • 10.2 Instrumental variables estimation with simulated data
    • 10.2.1 IV estimation in two steps
    • 10.2.2 IV estimation in one step
    • 10.2.3 IV estimation with surplus instruments
  • 10.3 The Hausman test: simulated data
  • 10.4 Testing for weak instruments: simulated Stata
  • 10.5 Testing the validity of surplus instruments
  • 10.6 Estimation using the Mroz data
    • 10.6.1 Least squares regression
    • 10.6.2 Two-stage least squares
    • 10.6.3 Instrumental variables
    • 10.6.4 Instrumental variables estimation with surplus instruments
  • 10.7 Testing the endogeneity of education
  • 10.8 Testing for weak instruments
  • 10.9 Testing the validity of surplus instruments
    Key Terms
    Chapter 10 Do-file

Chapter 11 - Simultaneous Equations Models

  • 11.1 Truffle supply and demand
  • 11.2 Estimating the reduced form equations
  • 11.3 2SLS estimates of truffle demand
  • 11.4 2SLS estimates of truffle supply
  • 11.5 Supply and demand of fish
  • 11.6 Reduced forms for fish price and quantity

Chapter 12 - Nonstationary Time Series Data and Cointegration

  • 12.1 Stationary and nonstationary data
  • 12.2 Spurious regressions
  • 12.3 Unit root tests for stationarity
  • 12.4 Integration and cointegration
  • 12.5 Engle-Granger test
    Key Terms
    Chapter 12 Do-file

Chapter 13 - An Introduction to Macroeconometrics: VEC and VAR Models

  • 13.1 VEC and VAR models
  • 13.2 Estimating a VEC model
  • 13.3 Estimating a VAR
  • 13.4 Impulse responses and variance decompositions
    Key Terms
    Chapter 13 Do-file

Chapter 14 - An Introduction to Financial Econometrics: Time-Varying Volatility and ARCH models

  • 14.1 ARCH model and time-varying volatility
  • 14.2 Testing, estimating, and forecasting
    • 14.3 Extensions
      14.3.1 GARCH
    • 14.3.2 Threshold GARCH
    • 14.3.3 GARCH-in-mean
  • Key Terms
    Chapter 14 Do-file

Chapter 15 - Panel Data models

  • 15.1 Sets of regression equations
  • 15.2 Seemingly unrelated regression
  • 15.3 The fixed effects model
    • 15.3.1 A dummy variable
    • 15.3.2 The fixed effects estimator
    • 15.3.3 The fixed effects estimator for a microeconometric panel
  • 15.4 Random effects estimation
    • 15.4.1 Breusch–Pagan test
    • 15.4.2 Hausman test
  • Key Terms
    Chapter 15 Do-file

Chapter 16 - Qualitative and Limited Dependent Variable Models

  • 16.1 Models with binary dependent variables
  • 16.2 Multinomial logit
  • 16.3 Conditional logit
    • 16.3.1 Release 9: clogit
    • 16.3.2 Release 10: asclogit
  • 16.4 Ordered choice models
  • 16.5 Models for cont data
  • 16.6 Censored data models
    • 16.6.1 Simulated data example
    • 16.6.2 Mroz data example
  • 16.7 Selection bias
    Key Terms
    Chapter 16 Do-file

Appendix A/ Review of Math Essentials

  • A.1 Stata math and logical operators
  • A.2 Math functions
  • A.3 Extensions to generate operations
  • A.4 The calculator
  • A.5 Scientific notation
    Key Terms

Appendix B/ Review of Probability

  • B.1 Stata probability functions
  • B.2 Binomial probability functions
  • B.3 Normal probability calculations
  • B.4 t-distribution probability calculations
  • B.5 F-distribution probability calculations
  • B.6 Chi-square distribution probability calculations
    Key Terms
    Appendix B Do-file

Appendix C/ Review of Statistical Inference

  • C.1 Examining the hip data
    • C.1.1 Constructing a histogram
    • C.1.2 Obtaining summary statistics
    • C.1.3 Estimating the population mean
  • C.2 Using simulated data values
  • C.3 The central limit theorem
  • C.4 Interval estimation
    • C.4.1 Using simulated data
    • C.4.2 Using the hip data
  • C.5 Testing the mean of a normal population
    • C.5.1 Right rail test
    • C.5.2 Two tail test
  • C.6 Testing the variance of a normal population
  • C.7 Testing the equality of two normal population means
    • C.7.1 Population variances are equal
    • C.7.2 Population variances are unequal
  • C.8 Testing the equality of two normal population variances
  • C.9 Testing normality
  • C.10 Maximum likelihood estimation
    Key Terms
    Appendix C Do-file

Index