We examined a sample of firms that significantly outperformed their business sectors in shareholder returns over a 10-year period (dubbed "Stars") and a matched sample
of companies that underperformed their sectors during the same period ("Laggards").
1989) compare raw and risk-adjusted performance on firms in the original sample, a market index, and a matched sample
of firms based on size and market capitalization similar to the "excellent" firms.
Data were obtained from a matched sample
of organizations in Jordan, and the causal model proposed by Miller and Mahmoudi is reanalyzed for all three countries employing a more rigorous meth odology.
If the comparison shows the emerging cooperatives to be financially weaker than the matched sample
of non-merged cooperatives, then it is reasonable to conclude that the underlying reason for the merger is to improve financial and operational performance.
From the same starting population of 26,429, the researchers then selected a demographically matched sample
of 1,031 men and women who did not develop hypertension by age 55.
The item is calculated as the product of two factors: (1) the prior-year data for the affiliate and (2) the ratio of current- to prior-year data for a matched sample
of affiliates (those that reported in both the prior and current year) that were in the same industry group as the affiliate whose data are being estimated and that had assets, sales, or net income of less than $50 million.
The analysis of teacher retention was based on a matched sample
of over 2,600 teachers in Chicago TAP and conventional public schools.
IPOs do not underperform in the aftermarket on a risk-adjusted basis and do not underperform a matched sample
As Panel B shows for the matched sample
, the increases in the means of these institutional ownership variables are much smaller (8.
They are also examining changes that occur in offenders who participate in the ICC, as opposed to a matched sample
of offenders who do not.
The study examined the four-year academic achievement growth of more than 600 students who were given a voucher in the 2006-07 school year, compared to the academic achievement growth of a matched sample
of students who had attended Milwaukee public schools.
To form the matched sample
, for each IPO in the subsequent IPO sample we pick an IPO in the comparison group whose offer date was within 2 months of the SIPO's offer date.