The Quant-y, Measurable-y Stuff

This post is Part 3 of a five-part series on measuring Al Mokha’s impact in Yemen. (It is also available on Al Mokha’s blog, as are Part 1 & Part 2)

Erin and a Tanzanian woman smiling with an orange dirt background
Author (on right) in Nyarugusu, Tanzania, during a project for the International Rescue Committee 

As a development economist with interests that are a little outside the norm, I spend a lot of my day thinking about how to measure unmeasurable things. How prevalent is a certain belief? And how does it affect people’s behavior? Can one violent event, or experience, be objectively seen as worse or more violent than another? And if so, what determines that violence—scope, tenor, frequency? How do we fix it?

So, when Anda told me he wanted to start thinking more about impact and measurement at Al Mokha, I jumped up and down with glee. From the moment he and I first talked development and coffee in Cambridge almost a year ago, I’d been questioning, “cool, but how do you measure that?”

As an aside, when I tell someone I’m an economist, there are a few common tropes that people immediately fall back on. There’s often an immediate question of whether I can do their taxes (I could probably hack it, but you’re better off with a CPA) or help them pick stocks (I am the last person you want doing that).

And then there’s the belief that I must work with GDP and trade or exchange rates.

I don’t do any of those things, but I do think that GDP is a great place to start thinking about measuring Al Mokha’s impact. Al Mokha doesn’t want to just sell coffee; it wants to fundamentally change Yemen’s economy by revitalizing a sector that has been decimated. And if you can revitalize a sector that at one point dominated an economy, you should be able to see change at the GDP-level.

GDP word graphic with jumbled mess of economics terms

GDP is deceptively simple. When you hear about it on the news, GDP is a single number, maybe a few numbers if someone talks about year-over-year growth and growth in a particular quarter, but usually just one number. That number, however, is made up of literally thousands of numbers, of transactions between people and firms and countries and governments. In many countries, as in the US, there is an entire government agency devoted simply to measuring GDP, to making the rules about what counts in GDP and what doesn’t.

Yemen has been seriously suffering in the GDP department. According to the Yemeni Ministry of Planning, Yemen’s GDP is projected to shrink by almost 35% in 2016. Compare that to a paltry 1% shrinkage seen during the Global 2008 Recession in the US.

If the (or one) goal is to grow Yemen’s economy rather than to shrink it, what would it take to increase Yemen’s GDP via coffee? The most straightforward way would be to increase the size of the coffee sector. Economists like to think about questions like this as changing extensive or intensive margins. The extensive margin would be to increase the number of acres planted. But we can increase the size of the coffee sector without planting one more coffee plant, if the price of coffee beans from Yemen simply goes up, or yields are higher due to better fertilizer use or some other factor (the intensive margin).

"Coffee Up" word graphic with U a coffee cup

So, we started by asking a simple question, how do we raise GDP? And with one logical step, we already have four or five different outcomes we could try to measure (either separately or in tandem with GDP):

  1. acres of coffee planted
  2. kilograms of beans harvested in total
  3. coffee prices
  4. coffee yields (kilos of beans per acre)

And inside each one of those is also a list of measurable outcomes. For instance, do higher coffee prices lead to higher incomes for farmers? Or middlemen? And which is desirable (or is it both)? We went from one seemingly simple number to lots of measurable outcomes. Al Mokha is trying to figure out which ones it cares about.

Yemen coffee farmer picking coffee cherries

Finally, we also have to think about what may come out of this project that isn’t so good. “Unintended consequences” is kind of a loaded term right now if you’re following elections in the United States, but economists use the term a lot. We also call them externalities. While Al Mokha’s goals are to promote economic growth and diminish the appeal of violent insurgency, some may see pumping money into a failing state as foolish. It’s possible that any extra income going to farmers could be siphoned off by insurgent groups. Or that kids will be taken out of school to work in the fields. Or that creating demand for coffee will reduce agricultural space devoted to food, which is problematic in a country that is considered extremely food insecure by the World Food Program.

Some of the above are measurable, albeit with a lot of effort. We can examine what (little) data is coming out of Yemen from the government and international organizations. We can poll farmers who are supplying coffee about how much they are planting and earning. We can add up all the coffee production in the country and show how it changes year over year, and from there do a little back-of-the-envelope calculation on GDP change. We could show how higher prices of coffee offset negative welfare impacts (ala this paper on Quinoa in Peru by Bellemare, et. al.). Not that any of these is particularly easy in practice, but there’s at least a path to understanding them.

Yemeni man holding basket of bright red coffee cherries

Furthermore, lots of outcomes Al Mokha hopes to achieve are not measureable. I’m going to save that for my next post, the nebulous and qualitative, and leave you with this: deciding what to measure and how to measure it is an ongoing process. GDP is a great place to start. It is a number that is widely recognized as a measure of economic success, and an area that is visibly and severely suffering in Yemen right now. GDP-level change is the kind of change we’re hoping to accomplish.

So what does a change in GDP actually look like? I did a quick back-of-the-envelope calculation: doubling Yemen’s current coffee production (of 19,800 tons in 2013) will increase GDP somewhere between 0.30 and 3.73 percent. That may sound small, but it’s not. That’s $109 million – $1.3 billion.

It’s clear there’s huge potential to increasing coffee production at an economy-wide level and big picture, we’re focused on that. But there’s all those components, too. We’re going to keep digging down, into yields and acres planted, into where the money ends up and how it is spent, and into how it changes outcomes for families. We believe that impact is important. Al Mokha is trying to sell coffee, but with a purpose, and a seemingly simple goal to sell coffee will have many disparate impacts all over the economy, from the very biggest measurement, to the smallest.

Calculation, for those nerdy enough to care: First, note that good numbers from recent years are hard to come by, so these are estimates, but the leave us with answers that are generally on the same order of magnitude. If coffee production is 19,800 tons (2,200 pounds a ton, 2013 estimate from the Yemen Ministry of Agriculture), and farmers receive $2.50 per pound, doubling production would mean an extra $109 million in the economy, which is about 0.30% of 2013 GDP estimate of $35 billion (World Bank). However, GDP only counts finished goods, so if we take the US consumer price of Al Mokha coffee, at $30/pound, you end up with an extra $1.3 billion in the economy, a 3.73 percent change.

The reality is probably somewhere in the middle in terms of what would get counted in Yemen’s GDP as it is unlikely that U.S. consumer prices or green coffee bean prices are the relevant metric, beans will be priced differently according to quality, and ultimate benefit to farmers and Yemen depends on much value-add is done in-country and how much is exported. But even lower estimates of prices and current production yield effects on the same order of magnitude. If we assume exporters are getting $6/lb., that yields $261 million for a 0.75% increase in GDP.

Those interested in trying Al Mokha’s coffee can shop at

Note: I am Al Mokha’s advisory board member in development economics. I have no financial interests in Al Mokha and have received no compensation for this post.


Author: ekfletch

I am an independent researcher on issues of gender, labor, violence, education, and children.

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