* SPPQ paper on attorneys general.

* interpolation to fill in missing budget data.
* and to calculate predictive value of interpolated values.
* results referenced in SPPQ article.
* but not published.

GET
  FILE='C:\My Documents\research\COA_AG\temp\fullags.sav'.

MISSING VALUES othbud(0).

* ols regression to test accuracy of interpolation overall and state by state.

REGRESSION
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS R ANOVA
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT othbud
  /METHOD=ENTER budgeti.

sort cases by state.
split file by state.
REGRESSION
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS R ANOVA
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT othbud
  /METHOD=ENTER budgeti.

GRAPH
  /SCATTERPLOT(OVERLAY)=year   WITH staff (PAIR)
  /MISSING=INCLUDE.

execute.