Practitioners and academics are often faced with the problem that some time series of interest are not available at high frequencies. When related series exist, the Chow and Lin (1971) methodology can be used to disaggregate a low frequency series into its high frequency counterpart using the available related series. The aim of this paper is to increase accuracy of the Chow and Lin (1971) methodology by exploiting information from the cross-sectional dimension.
ContributionWe suggest jointly estimating multiple Chow and Lin (1971) equations, one for each crosssectional unit, restricting the coefficients to be the same across units in order to interpolate unit-specific data. In contrast to the estimation of single equations, unobservable timevarying characteristics (e.g. structural breaks) that are common across units can be taken into account. The proposed approach is straightforward to implement and can readily be applied to various settings.
ResultsWe provide empirical evidence that the panel-based approach can improve accuracy compared to single equation models, in particular when the time dimension of available data is short. Furthermore, the results suggest that controlling for unobservable time-varying characteristics can improve accuracy of the resulting interpolated series. Abstract Single equation models are well established among academics and practitioners to perform temporal disaggregation of low frequency time series using available related series. In this paper, we propose an extension that exploits information from the cross-sectional dimension. More specifically, we suggest jointly estimating multiple Chow and Lin (1971) equations, one for each cross-sectional unit (e.g. country), restricting the coefficients to be the same across units in order to interpolate unitspecific data. Using actual data on real GDP and industrial production for euro area countries we provide evidence that this approach can result in more accurate interpolated time series for individual countries. The results suggest that the inclusion of time fixed effects, which is not feasible in standard single equation models, can be helpful in increasing accuracy of the resulting series.