Volatility of earnings/return: .The volatility of a firm's earnings may be proxied by the standard deviation of the percentage of change in operating income (SIGOI
)(Titman and Wessels, 1988), or by the standard deviation of the first difference in annual earnings, scaled by the average value of the firm's total assets over the period (Bradley et al, 1984).
, SIGIR, Lothian & Edinburgh Heriot-Watt Univ.
Sponsor: SIGCHI, SIGCOMM, SIGGRAPH, SIGIR, SIGLINK, and SIGOIS
, in coop.
Volunteers from SIGBIO, SIGCHI,SIGCOMM,SIGGRAPH, SIGIR, SIGLINK and SIGOIS
joined together and are planning an annual series of premier conferences on research and development in multimedia computing.
Beginning July 1993, SIGACT, SIGARCH, SIGCHI, SIGGRAPH, SIGOIS
and SIGPLAN will be offering members a special "Member Plus" Program, offering discounted rates (even lower than the regular ACM member rate) on their conference proceedings.
Vendors, consultants and developers join SIGOIS
for its relevance to demanding business environments.
Organized and sponsored by Bellcore in cooperation with ACM SIGOIS
, the workshop was the first of its kind.
Sponsored by SIGGHI, SIGCOMM, SIGGRAPH, SIGIR, SIGLINK, and SIGOIS
In accordance with policy, the SIG Board voted on August 5 to approve the request to extend the terms of officers for the following Special Interest Groups: SIGForth; SIGOPS; SIGIR; SIGOIS
; SIGSIM; SIGMICRO; SIGCOMM; SIGSAC; SIGCAPH, and SIGUCCS.