This paper looks at some recent work on estimating quadratic variation using realised variance (RV) - that is sums of M squared returns. This econometrics has been motivated by the advent of the common availability of high frequency financial return data. When the underlying process is a...

In this paper we study the reliability of the mixed normal asymptotic distribution of realised variance error, which we have previously derived using the theory of realised power variation. Our experiments suggest that the asymptotics is reliable when we work with the logarithmic transform of...

This paper provides limit distribution results for power variation, that is sums of powers of absolute increments, for certain types of time-changed Brownian motion and $alpha $-stable processes. Special cases of these processes are stochastic volatility models used extensively in financial...

This paper shows that realised power variation and its extension we introduce here called realised bipower variation is somewhat robust to rare jumps. We show realised bipower variation estimates integrated variance in SV models --- thus providing a model free and consistent alternative to...

In order to assess the effect of jumps on realised variance calculations, we study some of the econometric properties of time-changed Levy processes. We show that in general we can derive the second order properties of realised variances and use these to estimate the parameters of such models....

We use high frequency financial data to proxy, via the realised variance, each days financial variability. Based on a semiparametric stochastic volatility process, a limit theory shows you can represent the proxy as a true underlying variability plus some measurement noise with known...

This paper estimattes the impact of unemployment on subsequent earnings for a large and repesentative sample of British men, 1984094. Unemploymentincidence is found to have only a temporary effect, an average earnings setback of 10% on re-engagement largely eroding over two years. The effect of...

The Welsh economy has undergone rapid structural change in recent years. This paper uses data from the New Earnings Survey to examine how earnings in Wales changed relative to those of Great Britain between 1975 and 1994. There are five main findings. First, earnings of workers in Wales have...

We study the role of preferences in the process of unemployment benefit determination. Perhaps surprisingly, survey evidence for the UK suggests that both the employed and unemployed wish to see a more generous level of unemployment benefits.

We present a simple model where unemployment benefits are determined in an economy in which there is endogenous delay in finding a job so that workers desire insurance against the possibility of unemployment.