Nanofluidic transport governed by the liquid/vapour interface

Liquid/vapour interfaces govern the behaviour of a wide range of systems but remain poorly understood, leaving ample margin for the exploitation of intriguing functionalities for applications. Here, we systematically investigate the role of liquid/vapour interfaces in the transport of water across apposing liquid menisci in osmosis membranes comprising short hydrophobic nanopores that separate two fluid reservoirs. We show experimentally that mass transport is limited by molecular reflection from the liquid/vapour interface below a certain length scale, which depends on the transmission probability of water molecules across the nanopores and on the condensation probability of a water molecule incident on the liquid surface. This fundamental yet elusive condensation property of water is measured under near-equilibrium conditions and found to decrease from 0.36 ± 0.21 at 30 °C to 0.18 ± 0.09 at 60 °C. These findings define the regime in which liquid/vapour interfaces govern nanofluidic transport and have implications for understanding mass transport in nanofluidic devices, droplets and bubbles, biological components and porous media involving liquid/vapour interfaces.Center for Clean Water and Clean Energy at MIT and KFUPM (Project R10-CW-09

Corporation taxes in the European Union: Slowly moving toward comprehensive business income taxation?

This paper is a substantial revision of a paper presented at the 71st Annual Congress of the International Institute of Public Finance (Dublin, 20–23 August, 2015), which was issued under the title Tackling Spillovers by Taxing Corporate Income in the European Union at Source, as CPB Discussion Paper 324 (February 2016) and as CESifo Working Paper No. 5790 (March 2016).This paper surveys and evaluates the corporation tax systems of the Member States of the European Union on the basis of a comprehensive taxonomy of actual and potential regimes, which have as their base either profits; profits, interest and royalties; or economic rents. The current regimes give rise to various instate and interstate spillovers, which violate the basic tenets—neutrality and subsidiarity—of the single market. The trade-offs between the implications of these tenets—harmonization and diversity, respectively—can be reconciled by a bottom-up strategy of strengthening source-based taxation and narrowing differences in tax rates. The strategy starts with dual income taxation, proceeds with final source withholding taxes and rate coordination, and is made complete by comprehensive business income taxation. Common base and cash flow taxation are not favored.http://link.springer.com/journal/10797am2017Economic

How weak are the signals? International price indices and multinational enterprises

International price indices (IPIs) provide the most timely and comprehensive market information available to international business. How do multinational enterprises (MNEs) affect the validity of IPIs? We review the earlier debate over methods for calculating IPIs, which concluded that unit values were inferior to specification prices, although most governments produce only unit value indexes. We explore three ways in which MNEs can affect the validity of IPIs: determining the ‘representative’ transfer price, excluding intrafirm transactions from the index, and choosing the ‘right’ transfer price along the transportation chain. We argue that MNE activities strengthen the case for specification prices; although still uncommon, they are the stronger signal of international markets. Our empirical analysis supports this hypothesis, finding that a 10% increase in the intrafirm trade share of US imports widens the gap between specification price and unit value by 1.3%, with transfer price manipulation further increasing the gap. Journal of International Business Studies (2004) 35, 61–74. doi:10.1057/palgrave.jibs.8400069