Robotics Productivity Leap
The question
Engineers in Halveston perfect a new generation of industrial robots. A single robot pays for itself many times over in the added output it produces, and factory owners say the machines make whole production lines worth building that no one would have built before. Assume household saving at each real interest rate is unchanged. Show the effect of this development in Halveston's loanable funds market. Show the effect on the Loanable Funds Market graph.
Drag a curve, or use the arrow buttons. Want the free-play version with every control? Open this graph in the sandbox.
Robotics Productivity Leap: the worked answer
On the Loanable Funds Market graph, Demand for loanable funds shifts right.
Why Demand for loanable funds shifts right
A firm finances a capital project only when the return it expects on that project beats the cost of borrowing. Robots that pay for themselves many times over raise the expected return on new equipment, so production lines that did not clear that bar before now do, and firms want to borrow more at every real interest rate, shifting the demand for loanable funds to the right. Household saving is unchanged by assumption, so the supply of loanable funds does not move.
What happens to the equilibrium
The equilibrium real interest rate rises and the equilibrium quantity of loanable funds increases.
The mistake students make on this one
A common wrong answer is to shift supply right, treating a technological leap as making the whole country richer and therefore better able to save. The stem fixes household saving at each real interest rate, and new technology reaches this graph through the return firms expect on new equipment, which is a decision about how much to borrow.
On exam day
Draw the shift, then say what the interest rate does to the other side. Here the higher rate pulls savers up along an unchanged supply curve, and calling that a movement along rather than a shift is often worth its own rubric point.
How this is graded
The checker reads every curve's position before and after your answer. You are marked correct only when Demand for loanable funds shifts right and every other curve on the Loanable Funds Market graph stays where it started — the same standard an AP reader applies to a drawn graph: the right shift, and nothing extra. There is no AI involved; the rubric is the geometry.
More Loanable Funds Market scenarios
Last updated