EViews Student Version. Today’s Workshop Basic grasp of how EViews manages data Creating Workfiles Importing data Running regressions Performing basic.

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Presentation transcript:

EViews Student Version

Today’s Workshop Basic grasp of how EViews manages data Creating Workfiles Importing data Running regressions Performing basic tests Creating/changing Series Working with commands

Thinking About EViews Workfile Central place to keep all of your work Objects – Series (Numeric, no alpha series in student version) – Equations – Graphs – Groups *Always comes with series for a constant, c, and residuals, resid

Workfiles Creating a Workfile – File → New → Workfile Data Structure Time Series → Dated/Regular → Frequency + Date Range Cross-Sectional → Undated/Irregular → Range of observations Save & Name (do not have to do this for this exercise) New Pages (Eviews 6) – By clicking on the “New Page” label at the bottom of the Workfile you can create new pages Select “By Frequency”

Exercise #1 Open the Excel file EViewsLab_data.xls, we will be working with the “Macro” sheet Create a new Workfile for today’s workshop

Importing Data Copy/Past Method 1. Open new “Empty Group” Quick → Empty Group Click on Cell 1 and press the “Up” arrow on keyboard → 2. Open Excel Make sure variable names are one constant “String” (no spaces!) Troubleshoot for other problems 3. Copy Data 4. Paste into Eviews Cell 1

Exercise #2 Import data Series from Excel sheet 1: Macro

Importing Data Import Directly 1.Count the number of variables and CLOSE Excel file 2.Proc →Import →Read Text-Locus-File 3.Browse for Excel file 4.

Exercise #3 Create a new page in the Workfile for the unstructured data in the “Micro” sheet Import, directly, the data from the “Micro” sheet

Descriptive Statistics Group – Stores select series together – Object → New Object → Group → Select Series → Name Descriptive Statistics – When group spreadsheet is open: – View → Descriptive Statistics → Common Sample → Correlogram

Exercise #3 Create a group for you INDEPENDENT variables (hint: consumption is your dependent variable) Find the Standard Deviation for each variable Run a correlation matrix of independent variables to determine if you might have multicolinearity (hint: look if off-diagonal absolute values are bigger than 0.5)

Create a new Equation – In your Workfile: – Object → New Object → Equation Separated by spaces: *Dependent variable *Constant, c *Independent variables (or Group) Regressions Sample Range Type of Regression

Output Name = Save to Workfile Regression Tests & Fixes Estimate: Modify Regression This View Useful to Create Model To Run Tests Regression Summary Coefficient Summary Statistics SAVE!

Looking at Residuals – In Equation View: – View → Actual, Fitted, Residual → Actual, Fitted, Residual Table Plotting Resid Vs. Fitted Values – Generate fitted values – In Equation View: “Forecast” → OK (is named “variable”f) – In Workfile: Object → New Object → Graph Graph: resid “variable”f Options → Type → Scatter Regression Tests & Fixes

Heteroskedasticity – In Equation View: – View → Residual Tests → White Heteroskedasticity (no cross) – Look at Chi-square value from a table (want a small value) – Fix: Click on “Estimate” Click on “Options” → check box for “Heteroskedasticity consistent coefficient covarariance” → OK Regression Tests & Fixes

Normality – View → Residual Tests → Histogram-Normality Test – Look at Jarque-Bera stat – Fix: Depending on skew, you can adjust variables (ex: square, log, etc) or add/delete variables Regression Tests & Fixes

Correlation & Multicolinearity – Create Correlation Matrix: – Quick → Group Statistics → Correlations – Off-diagonal values should be less than 0.5 – Fix: Talk to your advisor Regression Tests & Fixes

Exercise #4 Plot fitted values vs. residuals Check for Heteroskedasticity and fix if necessary Check for Multicolinearity Check for Normality

Changing/Creating Variables Edit Mode – In Spreadsheet: Toggle “Edit+/-” – CAREFUL! No “undo” Generate new variable – In Workfile: Click on “Genr” Enter equation: “new variable name” = equation Regular math function keys Lag: variable(-1)

Just for Fun… Opening a non-excel data file – Open peacekeeping.txt – Open Excel and open this.txt file from Excel Delimitate correctly Student Version does not use “alpha” objects (series with words) Select only numeric variables or change alpha variables into numeric values – Import into EViews as before Import Directly: Proc →Import →Read Text-Locus-File

Commands Top, Left-Hand “Command Box” Single commands Batch (program) Syntax: Command (Option) Argument

Commands Frequently Used Commands: – show variable – genr variable = equation – sample n1 n2 n1 and n2 represent the start and end of range Or qualifiers such that: sample variable if >15 Statistical Operations: – equation name.ls(h) dependent c independent variables – cor variables – group variables

Help! For general instruction or commands: – EViews PDFs ! – Help → Users Guide (pdf) → Command & Programming Reference (pdf)

All Done! If you would like more, individual help please see the Technical Statistical Coordinator