As a result, Mr Parry finds, the net benefits of a road-specific peak-period fee (the gain of less congestion minus the cost of disrupted travel) would be about three times bigger than a petrol-tax increase calculated to curb congestion by the same amount.
Despite its high price, the demand for physical gold for jewelry has continued its gain since it dipped in 2009, led partly by India, where demand reached a peak in January it had not seen since November of 2008.