Economists are divided over whether Thailand's central bank will keep its benchmark interest rate unchanged for the first time this year following four consecutive cuts.  The Bank of Thailand will maintain its one-day bond repurchase rate at 3.5 percent, according to nine of 17 economists surveyed by Bloomberg News. Seven economists expect a quarter of a percentage point cut, while one expects a half-percentage point reduction. The decision will be announced at 2:30 p.m. on Wednesday.  The following is a table of economists' estimates of where the central bank's one-day bond repurchase rate will be after tomorrow's policy meeting: