文中说是由上文11式微分而来,结果这个式子竟出现了积分。 “A.3.1 The Economy's Consolidated Budget Constraint As a first step we consolidate the intertemporal budget constraints of the private and public sectors to derive the economy's aggregate resource constraint. We now distinguish private bond holdings, BP, from national net claims on foreigners, B. You can verify that for any starting date t and terminal date t + T, differential equation (1 1) for financial wealth Q implies .................."
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另外A.3.1 The Economy's Consolidated Budget Constraint 怎么理解?