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The question of whether the real world corresponds to the model is a separate question to be answered as best we can ( Lord ,1980 , p6 ) . Government funding peaked during the Reagan military buildup of the 1980s , with its emphasis on the so-called " Star Wars " defense initiative . In its 1997 report , OECD reported that the number of countries with such programs has grown from three or four in 1.980 to almost all 30 OECD countries today . A compilation by Upham and Rice ( 1980 ) showed a clear increase in site numbers from the late Preclassic to Classic periods along the lower Salt River . Fundamental studies of technetium extraction in the 1980s , followed by more recent investigations of the structural and thermodynamic aspects of the extraction of alkali metal salts with crown ethers has led to a new technetium extraction process . The agency began investigating the discrepancies between DDS and ALJ rulings in 1980 , when Congress requested a study to investigate how well hearings decisions met legal requirements . During the late 1980s , when the total number of homicides was increasing rapidly , homicides by young people ( ages 24 and under ) increased , but homicides by older people actually decreased . They began putting content from their restaurant surveys onto services including Prodigy and Compuserve in the late 1980s , a practice they continue today . These exposures were produced by excavation of the crater by the 1980 landslides and lateral explosion as well as the subsequent erosion of Step and Loowit creeks by northerly stream flow out of the horseshoe-shaped crater . Sorcerers of Majipoor ( HarperPrism , August 97 , 462 pages , $ 23 ) , by Robert Silverberg , is the fifth volume in the science fantasy series that began with Lord Valentine 's Castle in 1980 . The 1980s and early 1990s were an exceptionally difficult period for low-income developing countries , particularly in Africa .