http://lehd.did.census.gov/...
Most Notably from the Census info
"Our first set of results confirmed findings from earlier work - firms that provide benefits tend to be larger and are more likely to be in manufacturing and wholesale trade. We used new measures to confirm other evidence that firms that offer benefits are better able to attract higher skilled, prime-age workers and have lower turnover (after controlling for size and industry). However, we also found that firms that offered benefits paid their employees more than those same employees would earn with the average non-benefit-offering firm-so workers appeared to earn both higher wages and better benefits than did observationally equivalent workers who worked for non-benefit offering firms.
Our last set of results was particularly interesting. We find that firms that offer benefits are less likely to fail - even after controlling for all other observable characteristics - than are firms that do not offer benefits. Many interpretations could be put on this. One is that of endogeneity - firms that are more likely to die (either due to current financial problems, or perhaps because they are an inherently more risky business) are less likely to offer benefits. This could either be as a way to cut down on current costs, or because workers value benefits less when the risk of future default is higher. Another possibility is that not enough firm-level controls were included."