nuts2_rv_urv

Related and Unrelated Variety Index values are calculated by using proximity approach following Hidalgo et al. (2007) and Boschma et al. (2012). We used International Trade Database at the Product Level (BACI) dataset to obtain the global proximity values. Although the BACI data set contains export data for more than 200 countries and territories, Hidalgo (2021) recommends to remove countries with exports below $ 1 billion, countries with a population of less than 1 million, and products with a global export value of less than $ 500 million from the dataset to eliminate noise and thus to obtain more accurate values. In this context, after the data cleaning process, the global product proximity values were calculated over approximately 970 product groups (4-digit HS classifications) for 132 countries. Then, we used the global proximity values and the regional export dataset (4-digit HS classifications) from Turkish Statistical Institute (TURKSTAT) to calculate related and unrelated variety from 2007 to 2020 for 26 NUTS-2 regions in Turkey.