WPI And A Whole Lot Of IssuesIncorrect or incomplete data limits ability to control inflationNo clarity on 'actual' rate of inflation, most experts say it's on the higher sideFrequent revisions in inflation data increase public outcry over price riseCalculation of inflation on the basis of wholesale prices under questionNew, improved urban consumer index to kick in soon, will replace WPI in 2 yearsA producer price index also in the works, to track reason behind price rises***LA