no code implementations • 12 Mar 2024 • Silvia Goncalves, Serena Ng
Often overlooked is the possibility that the out-of-sample error can be informative about the missing counterfactual outcome if it is mutually or serially correlated.
no code implementations • 3 Mar 2023 • Serena Ng, Susannah Scanlan
This is also the case for a weekly version of the CFNAI index of economic activity that is imputed using seasonally unadjusted data.
no code implementations • 8 Sep 2021 • Jushan Bai, Serena Ng
Pervasive cross-section dependence is increasingly recognized as a characteristic of economic data and the approximate factor model provides a useful framework for analysis.
1 code implementation • 4 Mar 2021 • Ercument Cahan, Jushan Bai, Serena Ng
Economists are blessed with a wealth of data for analysis, but more often than not, values in some entries of the data matrix are missing.
no code implementations • 3 Mar 2021 • Serena Ng
Dynamic responses of variables to shocks in a VAR similar in magnitude and shape to the ones identified before 2020 can be recovered by directly or indirectly modeling covid and treating it as exogenous.
no code implementations • 20 Feb 2021 • Jean-Jacques Forneron, Serena Ng
This paper illustrates two algorithms designed in Forneron & Ng (2020): the resampled Newton-Raphson (rNR) and resampled quasi-Newton (rqN) algorithms which speed-up estimation and bootstrap inference for structural models.
1 code implementation • 15 Jul 2020 • Sokbae Lee, Serena Ng
The result arises because the sketched estimates in the case of random projections can be expressed as degenerate $U$-statistics, and under certain conditions, these statistics are asymptotically normal with homoskedastic variance.
no code implementations • 15 Oct 2019 • Jushan Bai, Serena Ng
This paper proposes an imputation procedure that uses the factors estimated from a tall block along with the re-rotated loadings estimated from a wide block to impute missing values in a panel of data.