Gripped by economic worries, more and more parents are bringing their work home with them. Or worse, they are barely make it home at all. Sittercity Inc., which helps corporations provide child care benefits, says 42 percent of working parents are devoting extra time to their jobs. Eight percent have found second jobs. And nearly one in three stay-at-home parents are thrusting themselves back into the labor market (although it’s not clear where they’ll find new jobs). The survey suggests that sour economic conditions are to blame for cutting into family time and forcing parents to spend more money on child care. However, it is difficult to tell from the published results whether this phenomenon is widespread. Sittercity says the survey is based on its database of “hundreds of thousands of parents and sitters nationwide,” but there is no mention of how many people actually participated.