BEDFORD, Ohio  Factory owners have been adding jobs slowly but steadily since the beginning of the year, giving a lift to the fragile economic recovery. And because they laid off so many workers  more than two million since the end of 2007  manufacturers now have a vast pool of people to choose from.

Yet some of these employers complain that they cannot fill their openings.

Plenty of people are applying for the jobs. The problem, the companies say, is a mismatch between the kind of skilled workers needed and the ranks of the unemployed.

Economists expect that Friday’s government employment report will show that manufacturers continued adding jobs last month, although the overall picture is likely to be bleak. With the government dismissing Census workers, more jobs might have been cut than added in June.

And concerns are growing that the recovery could be teetering, with some fresh signs of softer demand this week. A central index of consumer confidence dropped sharply in June, while auto sales declined from the previous month.