<p>There is a common cognitive bias where people prefer past decisions they have made.</p>
<p>[Dan</a> Gilbert asks, Why are we happy? | Video on TED.com](<a href=“http://www.ted.com/index.php/talks/dan_gilbert_asks_why_are_we_happy.html]Dan”>http://www.ted.com/index.php/talks/dan_gilbert_asks_why_are_we_happy.html)</p>