For technical questions regarding estimation of single equations, systems, VARs, Factor analysis and State Space Models in EViews. General econometric questions and advice should go in the Econometric Discussions forum.
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I would like to exploit the "compromise" benefits of PMG estimation and estimate the ARDL Co-I relationship between real GVA levels for each of 12 industrial sectors and national GDP/GVA. Given the common long-run coefficient estimates in the PMG method (ie a unit coeff on GDP to ensure sectors add-up) is there any smart way to also allow for long-run trends in sector GDP shares (eg Manuf share -ve, Services share +ve). I presume the PMG method itself may be complicated by a (common) deterministic trend in the long run relationship ? Any guidance on how to model long-run sector share trends with PMG appreciated.
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