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Mark Roulston
Mark Roulston

30 Followers

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Mar 16, 2022

Science or marketing?

When evaluating a study one should ask whether it would have been published had the results turned out differently. If the decision to publish a study depends on the results obtained it is biased, even if its internal methodology is flawless. — Companies often produce content which looks “scientific”: e.g., reports containing statistics and graphs that demonstrate their software increases productivity, their investment portfolio delivers superior returns, or that their product is superior to that of their competitors. …

Publication Bias

4 min read

Science or marketing?
Science or marketing?
Publication Bias

4 min read


Mar 10, 2022

Why no climate warranties?

The market for climate risk forecasts suffers from information asymmetries which could be mitigated by warranties from forecast providers. Some potential reasons why warranties are not commonplace are worrying. — The market for climate risk forecasts suffers from a problem economists call “asymmetric information”: the sellers of forecasts probably know more about their accuracy than the buyers. A short or medium range weather forecast can be verified in a couple of weeks, and reasonable statistics about their accuracy can be…

Climate Forecasting

5 min read

Why no climate warranties?
Why no climate warranties?
Climate Forecasting

5 min read


Dec 17, 2021

How climate-related risk disclosures could become a cost without a benefit

The market for forward-looking climate information is structurally vulnerable to bad products pushing out good products. This will undermine the credibility of climate-related risk disclosures, turning them into a cost without a benefit. In 1970, the economist George Akerlof published what would become a classic paper called, “The Market for…

Climate Risk

4 min read

How climate-related risk disclosures could become a cost without a benefit
How climate-related risk disclosures could become a cost without a benefit
Climate Risk

4 min read


Oct 20, 2021

Navigating net zero with prediction markets

There is a proliferation of net zero pledges and commitments being made by countries and companies. We lack an effective mechanism to aggregate expertise and judgements about their credibility and thus predict our progress towards net zero. Purpose-built prediction markets would be well-suited to this task. — Next month the COP26 meeting will take place in Glasgow. The first stated goal of COP26 is to “Secure global net zero by mid-century and keep 1.5 degrees within reach.”

Climate Change

5 min read

Navigating net zero with prediction markets
Navigating net zero with prediction markets
Climate Change

5 min read


Published in Hivemind

·Dec 4, 2020

AGORA hurricane prediction markets settled

On November 30 the 2020 Atlantic hurricane season came to an end and Hivemind settled prediction markets forecasting how many hurricanes there would be and how many would make landfall over the U.S. — The 2020 hurricane season was one of the most active ever seen. There were 30 named storms, beating the 2005 record of 28. Of the 30 storms, 13 achieved hurricane strength and 6 of those made landfall over the U.S., with a further 4 making landfall over Central America.

Prediction Markets

2 min read

AGORA hurricane prediction markets settled
AGORA hurricane prediction markets settled
Prediction Markets

2 min read


Published in Hivemind

·Nov 24, 2020

How good are AGORA forecasts?

An analysis of forecasts produced by Hivemind’s AGORA prediction market platform suggests they are probabilistically calibrated. — AGORA is a prediction market platform that produces forecasts by aggregating the judgments of people taking part in the market. The collective forecast assigns a probability to each possible outcome. An obvious question, for anyone thinking about using AGORA for forecasting problems, is how good are AGORA forecasts?

Prediction Markets

4 min read

How good are AGORA forecasts?
How good are AGORA forecasts?
Prediction Markets

4 min read


Published in Hivemind

·Oct 21, 2020

Current outlook: hurricane prediction market

Mark Roulston, Senior Data Scientist • 08 Sep 2020 Earlier this month Hivemind joined Cohort-5 of Lloyd’s Lab programme to promote InsurTech startups. As part of our activities in this programme, we are running a prediction market for the number of hurricanes that will form in the Atlantic this year…

Prediction Markets

2 min read

Current outlook: hurricane prediction market
Current outlook: hurricane prediction market
Prediction Markets

2 min read


Published in Hivemind

·Oct 21, 2020

Announcing the Sept 2020 Covid-19 prediction market settlement

Mark Roulston, Senior Data Scientist • 05 Oct 2020 We have been working in conjunction with Lloyd’s Lab to investigate the use of prediction markets — using AGORA, our prediction market tool — as a method for combining expert judgements into consensus forecasts relevant to the insurance industry. Some of the…

Prediction Markets

2 min read

Announcing the Sept 2020 Covid-19 prediction market settlement
Announcing the Sept 2020 Covid-19 prediction market settlement
Prediction Markets

2 min read


Published in Hivemind

·Oct 21, 2020

65 percent chance another hurricane will make US landfall this season

Mark Roulston, Senior Data Scientist • 15 Oct 2020 During the evening of Friday 9th October Hurricane Delta made landfall on the coast of Louisiana as a category 2 storm, very close to where Hurricane Laura made landfall in August. Delta was the fifth hurricane to make landfall over the…

Prediction Markets

2 min read

65 percent chance another hurricane will make US landfall this season
65 percent chance another hurricane will make US landfall this season
Prediction Markets

2 min read


Oct 21, 2020

65 percent chance another hurricane will make US landfall this season

Mark Roulston, Senior Data Scientist • 15 Oct 2020 During the evening of Friday 9th October Hurricane Delta made landfall on the coast of Louisiana as a category 2 storm, very close to where Hurricane Laura made landfall in August. …

2 min read

65 percent chance another hurricane will make US landfall this season
65 percent chance another hurricane will make US landfall this season

2 min read

Mark Roulston

Mark Roulston

30 Followers

Mark Roulston is a Co-Founder of Premetrica

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