Some low-wage employers are moving toward hiring part-time workers instead of full-time ones to mitigate the health-care overhaul's requirement that large companies provide health insurance for full-time workers or pay a fee.

Several restaurants, hotels and retailers have started or are preparing to limit schedules of hourly workers to below 30 hours a week. That is the threshold at which large employers in 2014 would have to offer workers a minimum level of insurance or pay a penalty starting at $2,000 for each worker.

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