Posts Tagged ‘social network analysis’

Really a Nontraded Commodity? – Datasets and code now available

05/12/2013 4 comments

Figure 1: Trade network for fresh potatoes.The most successful contribution to this blog is (a little to my own surprise) our analysis of the international potato trade network Really a Nontraded Commodity?

For all those who are interested in what’s behind that work, or who want to take the analysis further, or simply want to know how these graphs have been produced we have now made the matrices of bilateral trade in fresh, frozen, and seed potatoes as well as the R code publicly available.

All data comes with a Creative Commons license and is openly accessible at the zenodo repository.

(Thanks, zenodo, for this great service!)

Really a nontraded commodity? A look at the international potato trade network

08/11/2012 6 comments

by Ulrich Kleinwechter and Victor Suarez.

At times it is said that the potato is a largely nontraded crop which is produced, processed, traded and consumed mostly locally (CGIAR, 2011) and which is less affected by international price movements (FAO, 2008). In contrast to this view, the IMPACT model used, among others, in the Global Futures Project incorporates the assumption of a single world market for this commodity which is characterized by perfect price transmission and in which all country level prices are determined by a single world market price. Understandable that we were somewhat unhappy with this assumption…

So, we decided to dig a bit deeper into the problem. The first step was to obtain a global perspective of international potato trade. How are potatoes traded internationally? How do international trade flows look like? What is the structure of international potato trade?

Read more…