Results 111 to 120 of about 562,872 (260)

Innovation, Licensing, and Competition: Evidence From Genetically Engineered Crops

The Journal of Industrial Economics, EarlyView.
ABSTRACT We provide a novel empirical analysis of the role of technology licensing, between competitors, for genetically engineered (GE) traits in the US seed industry. We extend the standard differentiated‐product Bertrand pricing model to include trait licensing, which permits us to recover marginal costs and (otherwise unobserved) royalty rates ...
GianCarlo Moschini, Edward D. Perry
wiley   +1 more source

On Hadamard matrices

Journal of Combinatorial Theory, Series A, 1975
AbstractRecent advances in the construction of Hadamard matrices have depended on the existence of Baumert-Hall arrays and four (1, −1) matrices A, B, C, D of order m which are of Williamson type, that is pairwise satisfy 1.(i) MNT = NMT and2.(ii) AAT + BBT + CCT + DDT = 4mIm. If (i) is replaced by (i′)MN = NM we have Goethals-Seidel matrices.
openaire   +1 more source

Gradual Changes in Functional Time Series

Journal of Time Series Analysis, EarlyView.
ABSTRACT We consider the problem of detecting gradual changes in the sequence of mean functions from a not necessarily stationary functional time series. Our approach is based on the maximum deviation (calculated over a given time interval) between a benchmark function and the mean functions at different time points.
Patrick Bastian, Holger Dette
wiley   +1 more source

Tensor Changepoint Detection and Eigenbootstrap

Journal of Time Series Analysis, EarlyView.
ABSTRACT Tensor data consisting of multivariate outcomes over the items and across the subjects with longitudinal and cross‐sectional dependence are considered. A completely distribution‐free and tweaking‐parameter‐free detection procedure for changepoints at different locations is designed, which does not require training data.
Michal Pešta, Barbora Peštová, Martin Romaňák   +2 more
wiley   +1 more source

A Note on Local Polynomial Regression for Time Series in Banach Spaces

Journal of Time Series Analysis, EarlyView.
ABSTRACT This work extends local polynomial regression to Banach space‐valued time series for estimating smoothly varying means and their derivatives in non‐stationary data. The asymptotic properties of both the standard and bias‐reduced Jackknife estimators are analyzed under mild moment conditions, establishing their convergence rates.
Florian Heinrichs
wiley   +1 more source

Optimal Portfolio Choice With Cross‐Impact Propagators

Mathematical Finance, EarlyView.
ABSTRACT We consider a class of optimal portfolio choice problems in continuous time where the agent's transactions create both transient cross‐impact driven by a matrix‐valued Volterra propagator, as well as temporary price impact. We formulate this problem as the maximization of a revenue‐risk functional, where the agent also exploits available ...
Eduardo Abi Jaber, Eyal Neuman, Sturmius Tuschmann   +2 more
wiley   +1 more source

Capital in Motion: Synthesizing the Circulation and Reproduction in a Multi‐Sector Growth Model

Metroeconomica, EarlyView.
ABSTRACT This paper analyzes Capital in Motion (CIM) in a capitalist economy, based on Karl Marx's Capital, Volume 2. It examines the circuit of capital, distinguishing between stock and flow variables, and integrates a multi‐sector growth model that combines the circuit and turnover of capital with the reproduction scheme.
Takashi Satoh
wiley   +1 more source

Panel Sequential Group Estimation of Interactive Effects Models

Oxford Bulletin of Economics and Statistics, EarlyView.
ABSTRACT This paper proposes a novel procedure to identify latent groups in the slopes of panel data models with interactive effects. The method is straightforward to apply and relies only on closed‐form estimators when evaluating the objective function.
Ignace De Vos, Joakim Westerlund
wiley   +1 more source

Research of perfect punctured binary sequence pair in LCZ/ZCZ

Tongxin xuebao, 2006
Perfect punctured binary sequence pair was used in LCZ/ZCZ.The theory of LCZ/ZCZ sequence pair sets was defined,and three new methods for constructing LCZ/ZCZ sequence pair sets were presented: ZCZ sequence pair sets based on odd length perfect punctured
XU Lei, JIANG Ting, ZHOU Zheng
doaj   +2 more sources

On Regular Quaternary Hadamard Matrices

Journal of Combinatorial Designs, Volume 34, Issue 5, Page 215-227, May 2026.
ABSTRACT Through the use of regularizing vectors, all regular quaternary Hadamard matrices of orders 10 and 18 have been successfully identified. Of these, two matrices of order 10 and 184 matrices of order 18 were found to have unbiased mates. Converting the quaternary Hadamard matrices of order 18 to real Hadamard matrices, the study uncovered that ...
Hadi Kharaghani, Behruz Tayfeh‐Rezaie, Vlad Zaitsev   +2 more
wiley   +1 more source