Does the John Bates Clark Medal Boost Subsequent Productivity and Citation Success?

The graph is from this paper by Ho Fai Chan, Bruno S. Frey, Jana Gallus, & Benno Torgler.
From the conclusion

We also note a strong post-award citation gap that shows no sign of diminishing over time. On average, at five years after the award conferral, Clark medalists have 1.92 more weighted publications than the synthetic control group. Furthermore, Clark medalists attract 18.35 citations per publication, whereas the control group attracts 12.27, demonstrating a difference of 6.08 citations per pre-award publication. After another five years, the difference in weighted publications has grown to 2.46, whereas the gap in citations per article amounts to 14.02. Ten years after the award conferral, Clark medalists and the synthetic control group respectively attract 32.12 and 18.1 citations per publication on all articles published before the award.

Probably winners of the JBC Medal keep producing (as oppose to other winners, such as winners of the math field-medal) because the JBC Medal is a good indicator/inspiration to get the Nobel Prize in Economics. 

How Winning the Fields Medal Affects Scientific Output

Research productivity usually falls after scientists receive a Nobel Prize (Zuckerman, 1967), and that is because their obligations and activities change. It turns out that the same happens to mathematicians who win the Field Medal, although productivity declines for a different reason. 

From a paper by George J. Borjas and Kirk B. Doran

The abstract 

Knowledge generation is key to economic growth, and scientific prizes are designed to encourage it. But how does winning a prestigious prize affect future output? We compare the productivity of Fields medalists (winners of the top Mathematics prize) to that of similarly brilliant contenders. The two groups have similar publication rates until the award year, after which the winners’ productivity declines. The medalists begin to “play the field,” studying unusual topics at the expense of writing papers. This strategy is consistent with a model of human capital investments under uncertainty: the wealth effect of the prize encourages riskier knowledge investments.

Getting tenure might have a similar effect, on average, on risk taking and productivity.  
HT: Jonas Holmstrom.