Chapter 10

Dynamic Parametric Heterogeneity

Harking back to the explanation of dynamic parametric heterogeneity outlined in Chapter 3, typically researchers assume that all slope coefficients are constant over time. This means that we assume all relationships between x and y are also constant. In other words, given the simple model

115132.jpg (10.1)

researchers typically assume that

115144.jpg (10.2)

But instead, what if we actually had

115153.jpg (10.3)



Or, ...

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