S&P 500 trading strategies and stock betas

This paper shows that S&P 500 stock betas are overstatedand the non-S&P 500 stock betas are understated becauseof liquidity price effects caused by the S&P 500 tradingstrategies. The daily and weekly betas of stocks added to theS&P 500 index during 1985-1989 increase, on average, by0.211 and 0.130. The difference between monthly betas of otherwisesimilar S&P 500 and non-S&P 500 stocks also equals 0.125during this period. Some of these increases can be explainedby the reduced nonsynchroneity of S&P 500 stock prices,but the remaining increases are explained by the price pressureor excess volatility caused by the S&P 500 trading strategies.I estimate that the price pressures account for 8.5 percentof the total variance of daily returns of a value-weighted portfolioof NYSE/AMEX stocks. The negative own autocorrelations in S&P500 index returns and the negative cross autocorrelations betweenS&P 500 stock returns provide further evidence consistentwith the price pressure hypothesis.     

Manufacturing firms' decisions regarding retiree health insurance

The trend for employers to discontinue offering retiree health insurance has profound implications for a large and growing share of the U.S. older population. The authors explore factors related to the firm's decision to offer and contribute to retiree health insurance using data from manufacturing firms. Their findings indicate that while firm characteristics, such as size and age, affect the probability that a firm offers retiree health insurance, employer contributions to this benefit are significantly related to the firm's financial performance and the alternative insurance options available in the market. The article concludes with a brief discussion of policy-related measures with potentially important implications for the future of retiree health benefits.     

Government Revenue and Child and Maternal Mortality

Open Economies Review - Most maternal and child deaths result from inadequate access to the critical determinants of health: clean water, sanitation, education and healthcare, which are also among...