“…Therefore, some authors such as Litzenberger and Ramaswamy (1979) and Clinebell et al (1993) used the stock's closing price in the month preceding the dividend payment to compute the dividend yield. Blume (1980), Keim (1985), Chen et al (1990), Christie (1990), Nelson and Kim (1993), Liu (1993a, 1993b), Thomas (1998), andMcManus et al (2004) measured dividend yield as the ratio of the sum of dividends paid over the last twelve months to the stock price at the beginning of this period.…”