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Carbon Dioxide Levels Reach Unprecedented Highs: But Catastrophic Climate Change Can Still be Avoided

Alan Miller's picture
A handmade map of Georgia




















What an experience! It started bright and early on a Thursday morning as we boarded the car in the basement of the Word Bank office in Tbilisi and set off for a two-day visit to the Imereti region in the west of Georgia.

The first stop along our route was the Gelati Monastic Complex – a UNESCO World Heritage Site – which is an impressive conservation and restoration project supported through the World Bank’s Second Regional Development Project (RDP), the US Ambassador’s Fund for Cultural Preservation and the State Municipal Development Fund of Georgia. Our contribution is to help build infrastructure around the monastic complex that will facilitate tourist access to this historical site, and by consequence help further develop the local economy.

Celebrating 25 Years of the Montreal Protocol - and Looking Ahead

Rachel Kyte's picture

世界上大多数国家采用绝对贫困线测算其贫困率。绝对贫困线是衡量家庭为满足其基本需求而应该能够仰仗的资源的固定标准。不过,少数国家选择采用相对贫困线测算其贫困率。相对贫困线指的是相对于收入或消费在一国总体分布情况而言的分界线。

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上图显示了采用了两种贫困线的国家相对贫困率和绝对贫困生率的差异。您可以从下拉式列表中选择其它国家。如您选择了罗马尼亚,便能发现该国2006年开始从测算绝对贫困率转向测算相对贫困率。该国2006年绝对贫困率从2000年的35.9%稳步降至13.8%,但当年相对贫困率却为24.8%。这并不意味着2006年贫困率蹿升了。这两个数字根本不具可比性,但它们到底意味着什么呢?

Celebrating 25 Years of the Montreal Protocol - and Looking Ahead

Rachel Kyte's picture

One of the things I get asked when people are designing experiments – when they are either interested in or worried about spillover effects – is how to divvy up the clusters into treatment and control and what share of individuals within treatment clusters to assign within-cluster controls. The answer seems straightforward – it may look intuitive to assign a third to each group and I have seen a few designs that have done this, but it turns out that it’s a bit more complicated than that. There was no software that I am aware of that helped you with such power calculations, until now...