[Error: Irreparable invalid markup ('<a [...] |>') in entry. Owner must fix manually. Raw contents below.]
<a href="http://slate.msn.com/?id=2073161" Slate | The Ever-Expanding Restaurant Tip">Americans tip more often than others because we're more likely to be extroverts and/or neurotics, he suggests. Extroverts tip because they like the attention, while neurotics tip to reduce their anxiety and guilt about being served.</a>