Regulatory quality during each prime minister's tenure

Every prime minister since 1991, ranked by how the regulatory quality changed from their first day in office. Politare shows what happened during a tenure; it does not claim the office-holder caused it.

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Tenures

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Party

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Results

Order

#	Prime minister	In office	Total	Per year
1	DP Abhisit Vejjajiva	17 Dec 2008 – 5 Aug 2011	+1.5 points 2008 → 2011	+0.5 points/yr
2	N Prayut Chan-o-cha	22 May 2014 – 9 Jun 2019	+0.4 points 2013 → 2018	+0.1 points/yr
3	Prayut Chan-o-cha	9 Jun 2019 – 22 Aug 2023	−0.5 points 2018 → 2023	−0.1 points/yr
4	TRT Thaksin Shinawatra	9 Feb 2001 – 19 Sep 2006	−2.2 points 2000 → 2006	−0.4 points/yr

Sorted by total, highest first. Every row is indexed to the last count complete before the first day in office ("from" marks a start that had to move because that count had no data, or because the period cut it); Levels are per cent changes, rates are differences in points; "per year" compounds levels and divides rates. Tenures with under 12 months, or under three observations, are left out. points, 0 to 100, higher is better · World Bank, Worldwide Governance Indicators (GOV_WGI_RQ.SC): perceptions of the government's ability to make and carry out sound rules that let private business form and compete, a score from 0 to 100 with its 90 % interval · Thailand data · as of Aug 2026.