In 1996, David Neumark and William Wascher reexamined Card and Krueger's result using administrative payroll records from a sample of large fast food restaurant chains, and reported that minimum wage increases were followed by decreases in employment. An assessment of data collected and analyzed by Neumark and Wascher did not initially contradict the Card and Krueger results, but in a later edited version they found a four percent decrease in employment, and reported that "the estimated disemployment effects in the payroll data are often statistically significant at the 5- or 10-percent level although there are some estimators and subsamples that yield insignificant—although almost always negative" employment effects. Neumark and Wascher's conclusions were subsequently rebutted in a 2000 paper by Card and Krueger. A 2011 paper has reconciled the difference between Card and Krueger's survey data and Neumark and Wascher's payroll-based data. The paper shows that both datasets evidence conditional employment effects that are positive for small restaurants, but are negative for large fast-food restaurants. A 2014 analysis based on panel data found that the minimum wage reduces employment among teenagers.