The file wj1.wk1 contains information on some Spanish and aragonese variables:
GDP_e: Gross Domestic product of Spain (constant prices of 2008)
infl_a. Inflation rate of the Aragonese economy
ur_a: unemployement rate of the Aragonese economy
ur_e: unemployement rate of the Spanish economy
The sample size coves the period 1980-2014 for all these variables. According to this information, you should:
a) test for unit root null hypothesis
b) Interpret this result in economic terms
c) Determine the most appropriate ARIMA process
d) predict the values for 2015 and 2016.

Send  me the results in a Word document to the following eaddress: apleconometrics@gmail.com

The best prediction for 2016 ur_e will get the Francis Diebold badge. 
The best interpretacion of the economic implications of the unit root test results for the Ur_e will get the Edmund Phelps badge.