Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
The marginal propensity to invest (MPI) is the proportion of an additional increment of income that is spent on investment.
Share your knowledge with the community
Browse our collection of 300,000+ community-written definitions
