Review the World bank study on crude oil price differential. Select two different types of crude oil products. Research historical price data for these products for numerous periods (helpful to have more data vs less).

1. Use the article and the regression equation in the study to explain the impact of different sulfur and density on 2 different crude oil benchmarks with different quality specs (sulfur and gravity.

http://documents.worldbank.org/curated/en/673981468778803478/Crude-oil-prices-Predicting-price-differentials-based-on-quality

2. As resources, I am sharing additional information on crude qualities

https://www.spglobal.com/commodityinsights/plattscontent/_assets/_files/downloads/crude_grades_periodic_table/crude_grades_periodic_table.html

https://www.businessinsider.com/crude-oil-around-the-world-2014-5

https://www.crudemonitor.ca/

https://corporate.exxonmobil.com/what-we-do/energy-supply/crude-trading/crude-oil-blends-by-api-gravity-and-by-sulfur-content#aPIGravity

https://www.equinor.com/energy/crude-oil-assays