Relationship between Risk and Expected Returns: Evidence from the Dhaka Stock Exchange
2ND ANNUAL INTERNATIONAL CONFERENCE ON ACCOUNTING AND FINANCE (AF 2012) AND QUALITATIVE AND QUANTITATIVE ECONOMICS RESEARCH (QQE 2012), cilt.2, sa.null, ss.1-8, 2012 (Hakemli Dergi)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 2 Sayı: null
- Basım Tarihi: 2012
- Doi Numarası: 10.1016/s2212-5671(12)00058-5
- Dergi Adı: 2ND ANNUAL INTERNATIONAL CONFERENCE ON ACCOUNTING AND FINANCE (AF 2012) AND QUALITATIVE AND QUANTITATIVE ECONOMICS RESEARCH (QQE 2012)
- Sayfa Sayıları: ss.1-8
- İstanbul Gelişim Üniversitesi Adresli: Hayır
Özet
We re-examine the possible magnitude of the supersymmetric contribution to $R_b\equiv\Gamma(Z^0\to\bar b b)/\Gamma(Z^0\to{\rm all})$ in the light of the constraints imposed by the absence of light charginos at LEP~1.5, implementing also other available phenomenological constraints. We find the supersymmetric contribution to be $R^{\rm susy}_b < 0.0017$, and discuss the extent to which this upper bound could be strengthened by future constraints on the chargino and top-squark masses. Such values of $R^{\rm susy}_b$ tend to disfavor a supersymmetry explanation of the apparent $R_b$ discrepancy.