The phrase "textbook models" is correct and can be used in written English.
It refers to models or examples that are commonly found in textbooks. Example: In order to understand the concept, our teacher presented us with textbook models of simple machines such as levers and pulleys.
But real financial markets are more complex than the textbook models.
For example, the housing market collapse that left millions of US homeowners underwater is not part of textbook models, but it made precise calculations of fiscal stimulus based on them impossible.
In textbook models a negative shock in one economy should not drag down others with floating exchange rates against that economy, because their independent central banks can offset the contractionary pressure.
He asks what would happen if investors were to deviate from economists' textbook models in two ways: by focusing on the returns they earn, rather than the money they have to spend; and by judging the risk of an investment according to how often they look at their portfolio even if their plan is never to change it.
This result is at variance with textbook models, where the relationship is assumed to be linear.
We do know that a vast collection of literature exists for plant gene-microbe interactions, and many are textbook models, such as those genes involved in the invasion and colonization of Agrobacterium, which involves a complex interplay that would dwarf some of the host-microbe crosstalk in animals (Nester, 2015; Ellis, 2017).
"This is a textbook model for a successful strategic investment," he said in a statement.
I won't try to push this parable (actually just a colorful version of a standard textbook model) any further.
In recent years, the legislative process in Congress has often been twisted so it looks nothing like the textbook model of how a bill becomes law.
I think the textbook model allowed us to put a veneer of order on our otherwise unruly and occasionally nonsensical subject matter.
The potential output series he's using comes from the Congressional Budget Office, which describes its method (pdf): CBO's estimate of potential output is based on the framework of a textbook model of long-term economic growth, the Solow growth model.
