Unified Inference for Nonlinear Factor Models from Panels with Fixed and Large Time Span

Torben G. Andersen, Nicola Fusari, Viktor Todorov, Rasmus T. Varneskov

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

We provide unifying inference theory for parametric nonlinear factor models based on a panel of noisy observations. The panel has a large cross-section and a time span that may be either small or large. Moreover, we incorporate an additional source of information, provided by noisy observations on some known functions of the factor realizations. The estimation is carried out via penalized least squares, i.e., by minimizing the L2 distance between observations from the panel and their model-implied counterparts, augmented by a penalty for the deviation of the extracted factors from the noisy signals of them. When the time dimension is fixed, the limit distribution of the parameter vector is mixed Gaussian with conditional variance depending on the path of the factor realizations. On the other hand, when the time span is large, the convergence rate is faster and the limit distribution is Gaussian with a constant variance. In this case, however, we incur an incidental parameter problem since, at each point in time, we need to recover the concurrent factor realizations. This leads to an asymptotic bias that is absent in the setting with a fixed time span. In either scenario, the limit distribution of the estimates for the factor realizations is mixed Gaussian, but is related to the limiting distribution of the parameter vector only in the scenario with a fixed time horizon. Although the limit behavior is very different for the small versus large time span, we develop a feasible inference theory that applies, without modification, in either case. Hence, the user need not take a stand on the relative size of the time dimension of the panel. Similarly, we propose a time-varying data-driven weighting of the penalty in the objective function, which enhances efficiency by adapting to the relative quality of the signal for the factor realizations.
OriginalsprogEngelsk
TidsskriftJournal of Econometrics
Vol/bind212
Udgave nummer1
Sider (fra-til)4-25
Antal sider22
ISSN0304-4076
DOI
StatusUdgivet - sep. 2019

Emneord

  • Asymptotic bias
  • Incidental parameter problem
  • Inference
  • Large data sets
  • Nonlinear factor model
  • Options
  • Panel data
  • Stable convergence
  • Stochastic volatility

Citer dette

Andersen, Torben G. ; Fusari, Nicola ; Todorov, Viktor ; Varneskov, Rasmus T. / Unified Inference for Nonlinear Factor Models from Panels with Fixed and Large Time Span. I: Journal of Econometrics. 2019 ; Bind 212, Nr. 1. s. 4-25.
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Unified Inference for Nonlinear Factor Models from Panels with Fixed and Large Time Span. / Andersen, Torben G. ; Fusari, Nicola; Todorov, Viktor; Varneskov, Rasmus T.

I: Journal of Econometrics, Bind 212, Nr. 1, 09.2019, s. 4-25.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

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KW - Options

KW - Panel data

KW - Stable convergence

KW - Stochastic volatility

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