WASHINGTON — The deep recession wiped out primarily high-wage and middle-wage jobs. Yet the strongest employment growth during the sluggish recovery has been in low-wage work, at places like strip malls and fast-food restaurants.

In essence, the poor economy has replaced good jobs with bad ones. That is the conclusion of a new report from the National Employment Law Project, a research and advocacy group, analyzing employment trends four years into the recovery.

“Fast food is driving the bulk of the job growth at the low end — the job gains there are absolutely phenomenal,” said Michael Evangelist, the report’s author. “If this is the reality — if these jobs are here to stay and are going to be making up a considerable part of the economy — the question is, how do we make them better?”

The report shows that total employment has finally surpassed its pre-recession level. “The good news is we’re back to zero,” Mr. Evangelist said.