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spec: Scanning-tunneling microscopy ( STM ) can image surfaces of conducting materials with atomic-scale resolution . An important role for government in the economy is to define , establish , and enforce property rights . In the transaction , stripping the gain leg of the straddle leads to noneconomic increases in basis which exceed 400 percent . The aim must be to define , in an operational fashion , in which cases the Fund can rely on its traditional catalytic role to ensure private sector involvement , and in which cases more concerted forms will be necessary .