Results 171 to 180 of about 117,548 (306)
American Journal of Agricultural Economics, EarlyView.Abstract Large‐scale land reforms constitute a substantial redistribution of wealth and reallocation of agricultural land, which is a major form of asset and production input in developing countries. While land redistribution (from the rich to the poor) remains a highly controversial issue, extensive evidence on its effect is limited.
Devashish Mitra +3 more
wiley +1 more source
Spectral gap of the Erlang A model in the Halfin-Whitt regime
Stochastic Systems, 2012 We consider a hybrid diffusion process that is a combination of two Ornstein-Uhlenbeck processes with different restraining forces. This process serves as the heavy-traffic approximation to the Markovian many-server queue with abandonments in the ...
Johan S.H. van Leeuwaarden +1 more
doaj
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
"An Asymptotic Expansion with Malliavin Weights: An Application to Pricing Discrete Barrier Options" [PDF]
This paper proposes a new approximation method for pricing barrier options with discrete monitoring under stochastic volatility environment. In particular, the integration-by-parts formula in Malliavin calculus is effectively applied in an asymptotic ...
Akihiko Takahashi, Toshihiro Yamada
core +2 more sources
American Journal of Botany, EarlyView.Abstract Premise Vegetative regeneration is a key mechanism of woody plant persistence in forest ecosystems, and the coupled roles of basal sprouting and clonal growth in shaping long‐term population dynamics have been understudied. Basal sprouting replaces stems at fixed ramet locations, whereas clonal growth via root suckering produces spatially ...
J. T. Michel +3 more
wiley +1 more source
Asymptotic properties of the Bernstein density copula for dependent data [PDF]
Copulas are extensively used for dependence modeling. In many cases the data does not reveal how the dependence can be modeled using a particular parametric copula. Nonparametric copulas do not share this problem since they are entirely data based.
ROMBOUTS, Jeroen V.K. +2 more
core
American Journal of Botany, EarlyView.Abstract Premise Floral adaptations to pollinators can drive lineage diversification and promote coexistence of species. We investigated the reproductive biology of Satyrium longicolle, a South African orchid that we hypothesized to belong to a long‐proboscid horsefly pollination guild and examined overlap of pollinators and floral traits among ...
Steven D. Johnson +3 more
wiley +1 more source
, 2005 We obtain an asymptotic formula for the number of negative eigenvalues of a class of two-dimensional Schrodinger operators with small magnetic fields. This number increases as a coupling constant of the magnetic field tends to zero.
Laptev, Ari,, Safronov, Oleg,
core
Late Cytomegalovirus Infections After Allogeneic Hematopoietic Cell Transplant
American Journal of Hematology, EarlyView.ABSTRACT Graft versus host disease (GVHD) prophylaxis with posttransplant cyclophosphamide (ptCY) and cytomegalovirus (CMV) prophylaxis with letermovir have changed the clinical epidemiology of CMV infection. We studied the incidence, risk factors for, and outcomes of CMV infection after Day + 90 of allogeneic hematopoietic cell transplant (alloHCT ...
George L. Chen +15 more
wiley +1 more source
An Asymptotic Analysis of Bivalent Monoclonal Antibody-Antigen Binding. [PDF]
Bull Math BiolHeirene LA +3 more
europepmc +1 more source