For simplicity or realism, determinacy analysis for overlapping-generations models typically aggregates all conceivable commodities into a fixed, finite number of types. Analysis finds robust examples with indeterminate equilibria, which suggests indeterminacy may be significant among overlapping generations. But does robust indeterminacy exist despite that simplifying aggregation? or because of aggregation? We suggest the latter with a generic determinacy theorem for overlapping-generations models with idealized competitive markets for a continuum of commodities in discrete or continuous time. And aggregating the continuum of commodities into a finite number of types transforms some of those generic, determinate models into ostensibly-robust indeterminacy examples.

为了简单或现实起见，重叠世代模型的确定性分析通常将所有可能的商品汇总为固定的有限数量的类型。分析发现了具有不确定平衡的可靠例子，这表明不确定性在重叠的世代之间可能很重要。但是，尽管简化了聚合过程，但是仍然存在强大的不确定性吗？还是因为聚集？我们为后者建议一个通用的确定性定理，用于离散世代或连续时间内连续商品的理想化竞争市场的重叠世代模型。而且，将商品的连续体聚合为有限数量的类型，可以将其中一些确定的通用模型转换为表面上健壮的不确定性示例。