Template-type: ReDif-Paper 1.0 Author-Name: Beutner, Eric Author-workplace-name: QE Math. Economics & Game Theory, RS: GSBE ETBC Author-Name: Heinemann, Alexander Author-workplace-name: QE Econometrics, RS: GSBE EFME Author-Name: Smeekes, Stephan Author-workplace-name: QE Econometrics, RS: GSBE EFME Title: A Justification of Conditional Confidence Intervals Abstract: To quantify uncertainty around point estimates of conditional objects such as conditional means or variances, parameter uncertainty has to be taken into account. Attempts to incorporate parameter uncertainty are typically based on the unrealistic assumption of observing two independent processes, where one is used for parameter estimation, and the other for conditioning upon. Such unrealistic foundation raises the question whether these intervals are theoretically justified in a realistic setting. This paper presents an asymptotic justification for this type of intervals that does not require such an unrealistic assumption, but relies on a sample-split approach instead. By showing that our sample-split intervals coincide asymptotically with the standard intervals, we provide a novel, and realistic, justification for confidence intervals of conditional objects. The analysis is carried out for a general class of Markov chains nesting various time series models. Classification-JEL: c53,c22,c32,g17 Series: GSBE Research Memoranda Creation-Date: 20171010 Number: 023 File-URL: https://cris.maastrichtuniversity.nl/ws/files/16594611/RM17023.pdf File-Format: application/pdf File-Size: 586512 Handle: Repec:unm:umagsb:2017023 DOI: 10.26481/umagsb.2017023