These days he tends to say he has been misunderstood about this.Economists who have looked at Europe, asking, in the manner of Mr Mundell, whether it is an optimal currency area, usually answer No. Factors are not sufficiently mobile between countries: this makes the exchange rate a useful price-adjuster, under certain circumstances.
One can nevertheless ask whether adjustments could have enabled it to provide a useful price signal for modifying behaviours and reducing emissions [14].
Asked to comment on the experiment, a Google spokesperson responded, "as part of our efforts to help people find great deals and useful pricing information, we're currently running a small test of a feature that highlights particularly good prices for products".
The financial role is evolving, from helping to optimize cloud costs to useful pricing analyses for new and existing products.
Two useful price comparison websites are mysupermarket.co.uk and wine-searcher.com, though neither is totally comprehensive.
A quote now making the rounds in the energy business sums up the argument: "The stone age did not end because the world ran out of stones, and the oil age will end long before the world runs out of oil .The past few years have provided a useful reminder that price gyrations impose real pain on economies, at both extremes.
All models included country (entered first) which was a useful predictor of price (partial R-squared 10.2%).
How can information that is widely available, like past price performance, be a useful guide to future price movements?
Craig McKinlay, mortgages director at Halifax, said: "House price per square metre is a useful measure for house price comparison because it helps to adjust for differences in the size and type of properties between locations.
The closing prices provide a useful marker for investors to assess changes in stock prices over time the closing price of one day can be compared to the previous closing price in order to measure market sentiment for a given security over a trading day [29].
