<p>From the inability of wealth to make us happier, to our catastrophic blindness to the credit crunch, "Economyths" reveals ten ways in which economics has failed us all. Forecasters predicted a prosperous year in 2008 for financial markets - in one influential survey the average prediction was for an eleven per cent gain. But by the end of the year, the Standard and Poor's 500 index - a key economic barometer - was down 38 per cent, and ma...