All these strings are in the bib file:

@STRING{ el = "Economics Letters" }
@STRING{ jie = "Journal of International Economics" }
@STRING{ jm = "Journal of Macroeconomics" }
@STRING{ brookings = "Brookings Papers on Economic Activity" }
@STRING{ sjes = "Swiss Journal of Economics and Statistics" }
@STRING{ res = "Review of Economic Studies" }
@STRING{ qje = "Quarterly Journal of Economics" }
@STRING{ jme = "Journal of Monetary Economics" }
@STRING{ jmcb = "Journal of Money, Credit, and Banking" }
@STRING{ jep = "Journal of Economic Perspectives" }
@STRING{ jel = "Journal of Economic Literature" }
@STRING{ jasa = "Journal of the American Statistical Association" }
@STRING{ eer = "European Economic Review" }
@STRING{ cr = "Carnegie-Rochester Conference Series on Public Policy" }
@STRING{ aer = "American Economic Review" }
@STRING{ jpm = "Journal of Policy Modeling" }
@STRING{ ier = "International Economic Review" }
@STRING{ ijfe = "International Journal of Finance and Economics" }

Depending on the version you use, you have to save them separately.