Andrew Corroll Russ Lidstone, JWT's head of planning, has plundered Lowe Worldwide's planning department and recruited its chief econometrician. Andrew Corroll joins the agency as its new head of statistics and econometrics. He is briefed to use econometric techniques to understand the challenges facing JWT clients. Corroll studied econometrics at the London School of Economics and subsequently London Business School. He has worked at the strategic marketing company Abram Hawks as a market analyst and also at CACI.