If the multiplier in the economy is 3, the marginal propensity to save (MPS) must be Naim 12:08 Economics Chapter 12 If the multiplier in the economy is 3, the marginal propensity to save (MPS) must be A) 0.33. B) 0.67. C) 1. D) 3. Answer: A Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+