RBA Rate Decisions More Powerful in Smaller Doses (AFR Piece)


The Australian Financial Review ran an opinion piece of mine (with my colleague, Jan Libich) that appeared in this morning’s edition (Tuesday 7 April), titled: “RBA Medicine Should be Dispensed in Smaller Doses” on p.43 (some of you will find the link to be gated)…or e-mail me a request if you cannot access it any other way.

It discusses an idea of ours to improve the impact of central bank interest-rate setting in Australia, which is to reduce the increment of change to the cash target rate (the main monetary policy instrument), from 25 to 10 basis points. Such a change would incur a relatively small adjustment cost, while providing a good return on extra ‘signalling power’. Read the piece to get more detail.

Social Science Showing Super Results on Anti-Doping Policy Idea


I had another op ed piece appear in the Australian Financial Review today, Monday 9 February: “Right Incentives may Keep Sports Industry Clean” (gated link). The piece is on p.35.

In it, I continue to build the case for ‘conditional superannuation’ as a possible supplementary anti-doping policy. Even though the war against doping may never be well-and-truly won; this idea remains a nice and intuitive incentive-based mechanism, which may very well produce a significant fall in the incidence of doping in sport.

Rugby’s ‘Bonus Points’ Work – Policymakers Should Take Note (AFR Piece)


I had yet another opinion piece that appeared in this morning’s edition of the Australian Financial Review (Friday 22 August), titled: “Use Bonus Points to Encourage Crowd-Pleasing Play” (link gated), on p.35. Alternatively, if you don’t have the hard copy, e-mail me a request.

It discusses research I have undertaken with Niven Winchester (MIT) on estimating the effect of the try bonus in Rugby to alter behaviour of players and coaches to produce more attacking rugby to score more tries, which after all is what the punters want.

It develops ideas discussed in this blog a few years ago. The paper title itself is the somewhat more esoteric: “Secondary Behavioural Incentives: ‘Field’ Evidence on Professionals”…hopefully coming soon to a good peer-refereed economics journal near you!

More on Optimal Sequencing: Soccer Edition


[Cross-posted at: Wages of Wins Journal, 7 August 2014]

This earlier Wages of Wins piece by Shane Sanders (July 29, 2014) generated plenty of discussion. It highlighted the problem of Triathlon deaths in the swim leg. One crucial point to make with many economic policy analogies on which to draw is that sequencing of the legs (or phases) matters – all other considerations aside, the ‘best’ sequence of phases can be optimized according to some objective (in this case, minimizing fatalities).

One such possible economic policy analogy is with respect to unemployment benefits. Imagine a two-phase policy, where in the first six months the recipient is eligible to a relatively unrestricted entitlement of an amount according to some predefined percentage (say 40%) of some benchmark (average weekly earnings or minimum full-time wage). If the recipient is still unemployed after the 6 months have elapsed, a second phase kicks in at which the benefit is now highly restricted thereafter (having to satisfy minimum job search requirements, etc.) and/or reduced in value. Now, many people will disagree as to whether this two-phase policy is too generous or too miserly (or even on the basis of something else entirely). However, one aspect most of us would agree on is that swapping the sequence of these two phases would make absolutely no sense whatsoever.

It got me thinking about other such analogies about sequencing from sport that could be useful in policy circles. Recently, I published an article in the December 2013 issue of Journal of Sports Economics [gated], along with Jan Libich (my colleague at La Trobe) and Petr Stehlίk (University of Western Bohemia, Czech Republic). We took on soccer’s penalty shoot-out problem.  In knock-out matches that are tied after 90 minutes, the following 30 minutes of overtime is often beset with overly-defensive play due to insufficient incentive to attack.   This means that overtimes often finishes goalless, and that nearly 50% of the time, the match is decided via penalty kicks anyway (put differently: in nearly one of every two ties, overtime fails to achieve the one and only thing it is fundamentally there to do).

We show that an alternative sequence – regulation time followed by a penalty shoot-out followed by overtime – improves attacking outcomes. The qualification is that, while the shootout produces a winner – you still play overtime, with the winner of that winning the contest as currently. It is only when overtime fails to resolve the deadlock that the winner becomes the team that had won the shootout already (think of winning the shootout as worth half-a-goal lead at the start of overtime).

Specifically, we show that the probability of at least one goal being scored in overtime rises by approximately 50% (depending on the underlying characteristics of the match). Exactly how we estimate the effect of a policy that’s never existed is outlined in the paper for those of you who are interested to read further.

Coming back to sequencing, why the simple economic intuition (as well as the data) says this rule change will likely work is the following: there will always be one team chasing the next goal, because they will be eliminated unless they do – they have little else to lose. While the other team may correspondingly become more defensive, we show the net effect to be overwhelmingly positive. Furthermore, what you will no longer get are those overtimes where both teams sit back having jointly overestimated the probability that they will win if it goes to a shootout.

Had Mario Götze spurned that chance just minutes from time in the recent World Cup final, and it had have instead gone to spot kicks, the penalty shootout problem would now be far higher on the soccer agenda. Nonetheless, better public policy (optimal sequencing included) should never be far from the agenda, so I hope to see more studies like this make some impact in the broader public policy debate.

Anti-Tanking Policy in the AFR


My newspaper op ed piece appeared this morning in the Australian Financial Review (Thursday 31 July), regarding my suggestion to circumvent tanking in pro-sports leagues with reverse-order drafts (see also this earlier post) called: “Stop Tanking: Rank Draft Picks by Finals Exit, Not Ladder“. See p.51 of the hard copy if you have it, or e-mail me a request (the link is gated). The timing is excellent – these things are often talked about long after the incident itself, typically round about when rumours surface of an impending investigation (or even later). Far better to spotlight the issue before the damage might actually occur.

More on Penalty Shoot-out Alternative


Following on from my post on 2 July, I had another newspaper piece in the Australian Financial Review (today, Tuesday 15 July), called: “GOAL! A Better Alternative to Penalty Shootouts“. The link is gated as usual (see p.43 of the hard copy if you have it, or e-mail me a request). It further delineates the economic case for shifting the penalty shoot-out to before extra-time.

Solution to World Cup Penalty Shoot-out Problem: ABC Interview with Waleed Aly


I returned to ABC Radio National’s Drive program with Waleed Aly, yesterday evening (Tuesday 1 July, go to link for audio).

The 2014 World Cup now in its knock-out phase (which brings with it the inevitable problem of extra-time and penalty shoot-outs, as well as perverse incentive effects to both teams to over-defend). Shining a light on this, Waleed and I discussed a simple rule-change proposal, based on economic principles, which we believe would produce better scoring outcomes in extra-time and diminish reliance on the game’s cruel version of Russian roulette to decide the winner (among numerous other improvements).

If you’re interested in the economics behind the proposal, you can see the abstract of the article from Journal of Sports Economics (December 2013 issue), on which it’s based, here.