DIGEST
USAir Shuttle joined Delta in offering a two-for-one weekend fare of $144 on round-trip flights that link Washington and New York and New York and Boston. While flights under the program can be taken any Saturday or Sunday until Labor Day, Sept. 6, tickets must be purchased by Aug. 3.</br></br>Philip Morris, which cut prices on Marlboro cigarettes in April, said it would continue that promotion indefinitely and slash wholesale prices by 40 cents on all of its premium brands. Rival R.J. Reynolds Tobacco promptly said it would revise prices on its brands to compete. Meanwhile, Philip Morris reported second-quarter earnings fell 22.2 percent, mainly because of a 53.1 percent drop in domestic tobacco earnings.</br></br>Orbital Sciences' launch in February of a Brazilian satellite was unsafe because of poor communications and inadequate authority, the National Transportation Safety Board said. The NTSB recommended procedural changes and levied no fines against Fairfax-based Orbital.</br></br>Integrated Health Services of Hunt Valley, Md., said it expects to post second-quarter earnings in line with analysts' estimates, Bloomberg Business News reported. Its prediction was made in response to frenzied trading yesterday when the stock opened off $2 and fell another $4 in the first 15 minutes of trading, before regaining upward momentum.</br></br>The world's multinational firms nearly doubled their pace of investments in Asia and Latin America over the five years through 1992 in a rapid expansion of global production networks based on low costs and high levels of technology and job skills, the United Nations reported.