INSTITUTES SEE NO WEST GERMAN RECESSION The five leading West German economic research institutes, which have revised down their forecasts for 1987 growth, do not predict a recession in West Germany, their spokesman, Hans-Juergen Schmahl said. The institutes were divided in their spring report on forecasts for 1987, with three predicting two pct growth and two seeing only one pct expansion. Growth was 2.4 pct in 1986. Schmahl, presenting the report at a news conference, said, "None of the institutes reckons with a recession or with the beginning of a recession." He added, however, that exports remained the weak point of the economy . Schmahl also said West Germany would have to expect further encroachments of foreign goods onto its markets. Arthur Krumper of Munich's Ifo institute, which with the DIW of West Berlin had presented the more pessimistic view of the economy, said, "The braking effects (on the economy) produced by external factors will remain considerable for most of the year."