Biomass allocation is an important plant trait that responds plastically to environmental heterogeneities. However, the effects on this trait of pollutants owing to human activities remain largely unknown. In this study, we investigated the response of biomass allocation of Phragmites australis to petroleum pollution by a ¹³CO₂ pulse-labelling technique. Our data show that plant biomass signifi...

OBJECTIVES This paper investigates sociodemographic and family structure factors that predict men's involvement (n = 773) in different gendered dimensions of filial caregiving: traditionally male, gender neutral, and traditionally female care. METHODS The concepts that guide this research relate to family obligations or motivations to provide care, specifically, commitment to care, legitimate...

Can Taxes Stabilize the Economy in the Presence of Consumption Externalities? Considering a finance constrained economy, we discuss the stabilization role of variable labour and capital income taxes under a balanced-budget rule in the presence of consumption externalities of the “keeping up with the Joneses” type. We find that sufficiently procyclical labor and/or capital income taxes are able ...

Introduction The role of education in local, state and national economic development has become a central public policy issue in recent years. Rural localities, in particular, which typically have lower education levels among the adult population than urban areas, view increased educational investments as an important component of an economic development strategy. At the same time, rural commun...

I use data from the 1994 Consumer Expenditure Survey as well as other sources to measure the distributional impact of green tax reforms and consumption tax reforms using both annual income and lifetime income approaches to rank households. A modest tax reform in which environmental taxes equal to 10% of federal receipts are collected has a negligible impact on the income distribution when the f...

This paper examines a firm’s investment intensity and timing decisions using a real options approach. The firm is endowed with a perpetual option to invest in a project at any time by incurring an irreversible investment cost at that instant. The amount of the irreversible investment cost determines the intensity of investment with decreasing returns to scale. The project generates a stream of ...

This paper studies the effects of effluent taxes on firms’ allocation of resources to cost-reducing and emission-reducing R&D, and on entrepreneurs’ decisions to develop new goods and enter the market. A tax set at an exogenous rate that does not depend on the state of technology reduces growth, the level of consumption of each good, and raises the number of firms. The induced increase in the v...

abstract tax is one of the main sources of financing government budget. therefore, having a clear picture about the attainable amount of taxes are not only necessary for optimal allocation of scarce resources for tax collection, but also helps the government to develop precise tax collection programs .in this article, the structural features of the tax revenues series have first been examined i...

the aim of this study is to review the rentier state theory, with special regard to iran. iran’s rentier state is highly dependent on oil revenues, but much less on tax revenues. even this negligible reliance on tax revenues, itself seems to be indebted to oil revenues. thus the main research hypothesis is that iran’s oil revenue is one of the main determinants of tax revenues. to empirically t...

On the UK Continental Shelf, up to 80,000 tonnes wet weight of oily drill cuttings are produced annually. These are heterogeneous wastes generated from the petroleum drilling industry, composed of significant percentages of hydrocarbons, heavy metals and chlorides. Since 1992, the discharge of drill cuttings containing more than 1% oil-on-cuttings has been prohibited. Moreover, the extensive in...