American Journal of Agricultural Economics, EarlyView.Abstract While multiple factors explain low adoption rates of improved varieties by small‐scale farmers in sub‐Saharan Africa, a key supply‐side constraint is the limited availability of seed embodying new traits in the volume, quality, price, and timeliness required by farmers. This constraint is partly attributable to classical failures in the market
Dawit Mekonnen +5 more
wiley +1 more source
American Journal of Agricultural Economics, EarlyView.Abstract This paper derives a firm‐level threshold, the Herfindahl Neutral Point, from the standard concentration index used in merger review. At this threshold, a marginal expansion leaves the index unchanged. Firms below the threshold reduce concentration when they expand; firms above it increase concentration.
Andrew J. Keller, Krishna P. Paudel
wiley +1 more source
The role of venture‐financed startups in innovation for US agriculture
American Journal of Agricultural Economics, EarlyView.Abstract To evaluate the role played by startup companies in the innovation ecosystem of US agriculture, we compile a unique dataset of 6024 new entrants founded 1987–2019 that details their financing lifecycles, annual economic performance, and patenting activities.
Gregory D. Graff +2 more
wiley +1 more source
Effect of Consecutive Jumping Trials on Metatarsophalangeal, Ankle, Knee and Hip Biomechanics During Take-Off and Landing: A Replication and Extension Study. [PDF]
Eur J Sport SciDuchene Y +5 more
europepmc +1 more source
An exploratory comparative analysis of kinematic characteristics in two elite Chinese show jumping riders. [PDF]
Front PsycholWang X +5 more
europepmc +1 more source
Differences in knee-ankle configuration and ankle joint kinetic characteristics during a drop landing vertical jump task in highly trained male basketball players: a cross-sectional study based on rebound efficiency. [PDF]
Front PsycholHe Y +7 more
europepmc +1 more source
Asia-Pacific Journal of Chemical Engineering, EarlyView.ABSTRACT The presence of antibiotics in water not only causes environmental pollution but also increases the growth of antibiotic‐resistant bacterial genes, which pose serious threats to human beings and other water residents. Large numbers of people are reportedly affected by the resistant bacterial genes, as many broad‐spectrum antibiotics are not ...
Amir Zada, Shohreh Azizi
wiley +1 more source
Estimation of Vertical Ground Reaction Forces During Vertical Jumping in Children Using OpenCap. [PDF]
Sensors (Basel)You J, Lin Z, Zhang B.
europepmc +1 more source
Advanced Physics Research, EarlyView.The mechanism and kinetics of selective GaAs growth on Si nanotip wafers via nanoheteroepitaxy were investigated as a function of pitch (center‐to‐center nanotip spacing). The pitch dependence reveals distinct surface‐diffusion‐controlled regimes, demonstrating that lateral Ga adatom transport on the SiO2 mask governs material redistribution and ...
Adriana Rodrigues +6 more
wiley +1 more source
Field-Based Concurrent Validity and Test-Retest Reliability of a Portable Force Platform During IMTP and Countermovement Jump Assessments. [PDF]
Bioengineering (Basel)Fidan U +3 more
europepmc +1 more source