Many voucher users would not have otherwise attended EISD schools.
The voucher shares (vouchers as a percentage of EISD enrollment) shown in the last column of Table 1 put voucher use in perspective by indicating relative size.
The EISD enrollment increase followed a surge in EISD test score gains that peaked in 1999-2000.
Within its small area, the EVP was of sufficient scale to generate some significant in-migration into the EISD, and prevent some of the out-migration that would have otherwise occurred.
We selected districts similar to the EISD, pre-EVP, and then, with some caveats, assumed that the large 1998-2008 differences between the EISD and the control districts were due to the EVP.
The levels and trends in those data were similar for the EISD and the districts listed above.
We excluded Crystal City from our current assessment of economic development issues because it is a largely rural district, and because an industrial park that arose after the conclusion of the Merrifield (2004) study makes it noncomparable to the EISD for assessment of EVP economic growth effects.
Our full EVP assessment shows that despite the effects of the EVP, the EISD and MGT districts stayed very similar in terms of the similarity determinants for the Merrifield (2004) control districts.
To update Merrifield (2004) and extend the analysis to economic activity effects, we collected more detailed data for the EISD and the control districts.