We examine the performance of nonlinear instrumental variable (NIV) unit root tests using various recursive detrending methods. We find that the NIV unit root tests using the recursive detrending method of Chang (2002) are the most powerful. They are more powerful than OLS based DF tests.

We find that short rates are more nonstationary than longer rates and that differences in conditional volatility exist between different maturities. Therefore, their dynamics may be both maturity specific and country specific, and any a priori generalizing assumptions may be misleading.

The behavior of impulse response coefficients as persistence measures is discussed under fractional integration. Results for long memory processes are extended to the antipersistent case of short memory.

The asymptotic distributions of the maximum likelihood estimator of the persistence parameter are developed in a linear diffusion model under three sampling schemes, long-span, in-fill and double. Simulations suggest that the in-fill asymptotic distribution gives a more accurate approximation to...

This paper examines the asymmetric response of the underground economy (UE) in Taiwan to an effective tax rate change. The UE size in Taiwan from 1962 to 2003 is estimated using a cash deposit ratio (CDR) approach and a currency demand approach. The impact of an increase in the effective tax...

In this paper we consider testing for a unit root in the possible presence of a trend break at an unknown time. Zivot and Andrews (1992) [Journal of Business and Economic Statistics 10, 251–270] proposed using the infimum of t-ratio Dickey–Fuller statistics across all candidate break points...

A Lagrangian multiplier test is proposed for testing market microstructure noise (MMN) in financial asset prices. The test is very simple and is asymptotically chi-squared with 1-degree of freedom. The test is applied to sampling interval determination for realized volatilities (RVs) which...

A novel procedure is applied to test for switches between hysteresis and the natural rate theory over more than a century of UK and USA unemployment data. For both the countries we see a period conforming to hysteresis starting in the early 1920s for the UK and 1930 for USA.

In this paper, we consider a model where producers set their prices based on their prediction of the aggregated price level and an exogenous variable, which can be a demand or a cost-push shock. To form their expectations, they use OLS-type econometric learning with bounded memory. We show that...