Results 21 to 30 of about 8,484,068 (292)

Dynamic Product Diversity [PDF]

open access: yesThe Journal of Industrial Economics, 2016
This paper examines the frequency of new product introductions in monopoly markets where demand is subject to temporary satiation. Consumers' taste for diversity is satisfied over time as new varieties are introduced to the market. If two varieties are introduced in consecutive periods then they become imperfect substitutes and the firm has an ...
Caminal, Ramon   +2 more
openaire   +5 more sources

Production diversity and dietary diversity in smallholder farm households. [PDF]

open access: yesProc Natl Acad Sci U S A, 2015
Significance Given that hunger and malnutrition are still widespread problems in many developing countries, the question of how to make agriculture and food systems more nutrition-sensitive is of high relevance for research and policy.
Sibhatu KT, Krishna VV, Qaim M.
europepmc   +5 more sources

Construction and Interpretation of Production and Market Metrics Used to Understand Relationships with Dietary Diversity of Rural Smallholder Farming Households

open access: yesAgriculture, 2021
Indicators of agricultural production diversity and market access and/or participation have often been used to try to understand how agricultural production and markets influence dietary diversity of rural smallholder households.
Eric O. Verger   +4 more
doaj   +1 more source

Farm Production Diversity and Household Dietary Diversity: Panel Data Evidence From Rural Households in Tanzania

open access: yesFrontiers in Sustainable Food Systems, 2021
Evidence on whether diversifying farm production leads to improved household dietary diversity and nutrition remains inconclusive. Existing studies analyzing the link between production diversity and dietary diversity are mainly based on cross-sectional ...
Lemlem Teklegiorgis Habtemariam   +5 more
doaj   +1 more source

Nutritional Value of Some Newly Introduced and Tested Forage Plants in the Southeastern Regions of Algeria [PDF]

open access: yesAl-Qadisiyah Journal For Agriculture Sciences, 2022
In Algeria, the high prices of animal products are due to the cost of food, itself linked to the lack of food resources.A fodder deficit really exists, it is urgent to remedy it by relaunching new varieties adapted to our pedoclimatic conditions to cover
khedidja djennane   +2 more
doaj   +1 more source

Immigration and product diversity [PDF]

open access: yesJournal of Population Economics, 2011
We study the effects of immigration on the diversity of consumption choices. Data from California in the 1990s indicate that immigration is associated with fewer stand-alone retail stores and a greater number of large and in particular big-box retailers—evidence that likely contradicts a diversity-enhancing effect of immigration.
Francesca Mazzolari, David Neumark
openaire   +2 more sources

Contribution to monitoring the influence of air temperature on some phenological stages of the date palm (cultivar ‘Deglet Nour’) in Biskra

open access: yesJournal of the Saudi Society of Agricultural Sciences, 2021
Algeria, one of the potential date producers in the world, is exposed to the different impacts of global warming. This climatic phenomenon probably has repercussions on date palm cultivation.
Mohammed Faci, Salah Eddine Benziouche
doaj   +1 more source

The effect of spices Coriandrum sativum L., Trigonella foenum-graecum L., Pimpinella anisum L., and their combinations on growth performance, carcass trait, and hematobiochemical parameters in broiler chicken [PDF]

open access: yesVeterinary World, 2022
Background and Aim: The incorporation of herbs and species has been shown to enrich the food with antioxidants and bioactive antimicrobial compounds, thereby preserving the safety and productivity of broiler chicken production.
Samira Meradi   +2 more
doaj   +1 more source

Professional diversity and the productivity of cities [PDF]

open access: yesScientific Reports, 2014
The relationships between diversity, productivity and scale determine much of the structure and robustness of complex biological and social systems. While arguments for the link between specialization and productivity are common, diversity has often been invoked as a hedging strategy, allowing systems to evolve in response to environmental change ...
Bettencourt, Luis M.A.   +2 more
openaire   +6 more sources

Diversity of aphids (Hemiptera: Aphididae) in oases agro-ecosystem: seasonal dynamics and host plants

open access: yesStudia Universitatis Babeș-Bolyai. Biologia, 2020
During the study conducted at the palm grove of Ziban oases from June 2017 until May 2018 and from 48 samples yellow water traps, a total of 969 aphids specimens were captured from 36 spontaneous plants identified at Ain Ben Noui palm grove, Biskra ...
Nacima DEGHICHE DIAB   +2 more
doaj   +1 more source

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