A university study reported that between 1975 and 1983 the length of the average workweek in a certain country increased significantly. A governmental study, on the other hand, shows a significant decline in the length of the average workweek for the same period. Examination of the studies shows, however, that they used different methods of investigation; thus there is no need to look further for an explanation of the difference in the studies' results. The argument's reasoning is flawed because the argument fails to ['recognize that varying economic conditions result in the average workweek changing in length', 'recognize that two different methods of investigation can yield identical results', 'distinguish between a study produced for the purposes of the operation of government and a study produced as part of university research', 'distinguish between a method of investigation and the purpose of an investigation']