(Undated) -- A new study shows three Minnesota job sectors are having trouble filling open positions. They are production services...nursing or medical services...and manufacturing. Of 213 businesses surveyed, employers reported over 15-hundred job openings in the second quarter of 2012. Many believe it's due to a shortage of skilled workers. But Steve Hine with the state Department of Employment and Economic Development says, while skills shortages may occur in certain areas, it's far from being the driving force behind the difficulties employers are having in finding qualified candidates. Hine says the data also shows employers are having troubles with skill mismatches...and candidates are concerned about unattractive wages, hours or location -- or a combination of the two.