Model Studio
Build the model piece by piece, then test it on a case.
About this tool
Every model the exam names, built by hand. Pick a model, see how it works piece by piece, then build it yourself. In Test yourself you build it, apply it to a case and pick out one of its limits.
Models are simplified ideas, not facts: each one here says what it assumes and where it fails.
How this trainer works
Build it. Tap a piece, then the place it belongs (or drag it). Some pieces belong to other models. Check grades every place, and the first mistake is named.
Apply it. A map, a graph or a table to read with the model. Invented places are labeled invented; real places come with the date of what is said about them.
Find a limit. One statement is a real limitation; the others are what the model claims or a misreading of it.
Free: Explore for every model and the demographic transition drills. The other drills are part of Premium.
Notes for this topic: The Demographic Transition Model