If you are looking for a free benchmarking study that indicates what percentage of revenue your industry spends on different expense categories, the percentage of assets they hold in cash, the profitability, etc. a good resource is BizStats.com. While BizStats has broader industry classifications than some paid benchmark studies, it's a quick, free way of seeing how your company compares.
Buy and Sell Well
Codiligent Business Brokers' blog on entrepreneurship, capitalism, and successfully buying and selling businesses.
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