The insecticidal potential of tea tree oil formulations was tested for contact and stomach poison toxicities against various stages the Spodoptera littoralis ((Boisduval, 1883) (Lepidoptera: Noctuidae) larvae under laboratory conditions. study carried out at Yozgat Bozok University Faculty Agriculture between 2020 2021. In toxicity test, were different by topical application. Among formulations...

This paper estimates a class of models which satisfy a monotonicity condition on the conditional quantile function of the response variable. This class includes as a special case the monotonic transformation model with the error term satisfying a conditional quantile restriction, thus allowing for very general forms of conditional heteroscedasticity. Furthermore, the monotonicity condition enab...

Gravity type models have often been used to analyse trade flows between countries and trading blocs. Previously however, these models were only applied to either cross-section data, or to single country time-series data, which imposed severe explicit (or implicit) restrictions on the specification of the model. Recently Gravity models have been generalised and adapted to a panel data setting, w...