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Adding lectures on Chow [1968], Chow and Levitan [1969], and Sargent [1989]#803

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Adding lectures on Chow [1968], Chow and Levitan [1969], and Sargent [1989]#803
HumphreyYang wants to merge 17 commits intomainfrom
chow

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@HumphreyYang HumphreyYang commented Feb 10, 2026

This PR adds two lectures based on Chow (1968), Chow and Levitan (1969), and Sargent (1989).

The lecture on Chow (1968) and Chow and Levitan (1969) are closely connected to spectral-domain analysis of business cycles and have important implications for what is required to generate spikes in the spectral domain, both in deterministic and stochastic models.

The lecture based on Sargent (1989) is another interesting application. It studies the impact of alternative measurement models on inference about underlying economic models. In general, how certain measurement choices can generate Granger causality in error-ridden data that is not present in filtered data generated from an alternative measurement model.

Both lectures are pretty substantial in size, but they tie together many of the lectures in this section and serve as really nice applications of the tools developed in the Introduction to Dynamics section.

@HumphreyYang HumphreyYang changed the title Adding one lectures on Chow [1968] and Chow and Levitan [1969] and one lecture on Sargent [1989] Adding lectures on Chow [1968], Chow and Levitan [1969], and Sargent [1989] Feb 10, 2026
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