Results 81 to 90 of about 366,445 (313)
Particulate Matter 2.5 (PM2.5): Persistence and Trends in the Air Quality of Five India Cities
AtmospherePoor air quality in India has sparked our interest in studying the time series dynamics of PM2.5 in India’s five most populous cities (Mumbai, New Delhi, Hyderabad, Chennai, and Kolkata).
Luis A. Gil-Alana +1 more
doaj +1 more source
Applied Economic Perspectives and Policy, EarlyView.ABSTRACT In recent decades, agriculture has become increasingly concentrated through horizontal mergers and acquisitions via corporate entities, and policy makers are concerned this will be exacerbated by the aging population of farm operators. To reduce market concentration in agriculture, many states have enacted policies to entice new prospective ...
Justin M. Ross +2 more
wiley +1 more source
International Journal of Crowd ScienceThe Badain Jaran Desert is the second-largest desert in China, and its lakes, which are generally small-sized and highly dynamic, play a significant role for plants and animals in this arid region.
Qinyu Zhao +4 more
doaj +1 more source
Exchange rate volatility, macro announcements and the choice of intraday seasonality filtering method [PDF]
Filtering intraday seasonality in volatility is crucial for using high frequency data in econometric analysis. This paper studies the effects of filtering on statistical inference concerning the impact of news on exchange rate volatility.
Laakkonen, Helinä
core
Modeling electricity prices: international evidence [PDF]
, 2002 This paper analyses the evolution of electricity prices in deregulated markets. We present a general model that simultaneously takes into account the possibility of several factors: seasonality, mean reversion, GARCH behaviour and time-dependent jumps ...
Escribano, Álvaro +2 more
core +3 more sources
Seasonal integration and the evolving seasonals model
International Journal of Forecasting, 1997 Abstract The paper uses a model of seasonality popular in the 1960s, the evolving seasonals model, to explore issues relating to testing for unit roots in seasonal time series. The model is used to show how data can be transformed in such a way that tests for seasonal integration simply become those for regular unit roots.
Hylleberg, Svend, Pagan, Adrian R.
openaire +3 more sources
Applied Economic Perspectives and Policy, EarlyView.ABSTRACT This study investigates the impact of geographical indication (GI) certification on the export performance of Turkish agri‐food products by analyzing both trade volume and unit value dynamics. Drawing on monthly data from 2000 to 2024 across 22 GI‐certified products, the research employs product‐level regressions, fixed‐effects panel models ...
Ihlas Sovbetov, Muge Burcu Ozdemir
wiley +1 more source
AnimalsAnts are key drivers of biodiversity in both tropical and temperate forests, though the underlying mechanisms of this remain debated. In tropical lowland rainforests, ants dominate the canopy as opportunistic predators, shaping arthropod abundance and ...
Andreas Floren, Tobias Müller
doaj +1 more source
Damped Seasonality Factors: Introduction [PDF]
Previous research has shown that seasonal factors provide one of the most important ways to improve forecast accuracy. For example, in forecasts over an 18-month horizon for 68 monthly economic series from the M-Competition, Makridakis et al.
J. S. Armstrong
core
AgriFood: Journal of Agricultural Products for Food, EarlyView.Fermented citrus transforms bioactive compounds into metabolites with probiotic and prebiotic properties, enhancing gut health, immunity, and metabolic balance. This review highlights fermentation's role in developing sustainable, health‐promoting functional foods while addressing challenges in process optimization, sensory quality, and commercial ...
Sony Kumari +3 more
wiley +1 more source