Results 101 to 110 of about 28,805 (302)

A simple explanation for the non-invariance of a Wald statistic to a reformulation of a null hypothesis [PDF]

For a given null hypothesis and its reformulation, the associated Wald statistics are shown to be members of a wider family of statistics where all members are asymptotically equivalent under the null hypothesis.
Naorayex K Dastoor
core  

Disentangling the relationships between denomination of origin regulatory councils activities and Spanish wineries' export performance

Agribusiness, EarlyView.
Abstract World markets for quality differentiated agri‐food products are highly competitive, presenting significant challenges for firms aiming to compete effectively. Government agencies and business organizations often implement various export promotion policies to address these challenges.
Nicolás Depetris‐Chauvin, Marta Fernández‐Olmos   +1 more
wiley   +1 more source

Do outgrower schemes enhance technology adoption and productivity? Evidence from maize farmers in Northern Ghana

Agribusiness, EarlyView.
Abstract Nucleus outgrower schemes are contractual arrangements where well‐resourced large‐scale farmers (nucleus farmers) are empowered by development support agencies to take charge of smallholder farmers, by providing them with market access and the necessary training on agronomic practices and farm inputs for production.
Dominic Tasila Konja, Awudu Abdulai
wiley   +1 more source

Can outsourcing pest and disease control help reduce pesticide expenditure? Evidence from rice farmers

Agribusiness, EarlyView.
Abstract Outsourcing pest and disease control (PDC) has grown rapidly worldwide, especially in developing countries. Although numerous studies have investigated various advantages of outsourcing PDC, little is known about its impact on pesticide expenditure.
Pengcheng Wang, Wanglin Ma, Mengling Diao   +2 more
wiley   +1 more source

Demonstration Training and Test Datasets for a 60/40 split that passes univariate KS 2 sample test and WALD test.

Random random seeds are used, but captured. The KS 2 sample univariate tests are then performed. All columns must pass.If the tests are passed, the WALD test is performed and the WALD test statistic scores captured.
Jan Blomerus (17413770)
core   +1 more source

Foreign labor, peer‐networking and agricultural efficiency in the Italian dairy sector

Agribusiness, EarlyView.
Abstract While the presence of immigrants in the agricultural sector is widely acknowledged, the empirical evidence on its economic consequences is lacking, especially from a microeconomic perspective. Using the Farm Accountancy Data Network panel data for Italian dairy farms in the period 2008–2018, the present study investigates the relationship ...
Federico Antonioli, Simone Severini, Mauro Vigani   +2 more
wiley   +1 more source

The Exact Distribution of the Wald Statistic

This paper derives the exact distribution of the Wald statistic for testing general linear restrictions on the coefficients in the multivariate linear model.
Peter C.B. Phillips
core  

Determinants of local food producer participation in state‐sponsored marketing programs: Evidence from Missouri

Agribusiness, EarlyView.
Abstract This study examines producer participation choices considering a variety of potential benefits linked to state‐sponsored marketing programs, using a real choice dataset of farmers in Missouri. Multinomial logit models are employed to predict determinants of farmer enrollment in three tiers of the Missouri Grown local food marketing program ...
Lan Tran, Ye Su, Laura McCann
wiley   +1 more source

Modified Wald test corresponding to maximally sleceted chi-square statistic

, 2014
習慣上，我們利用列聯表分析來判斷兩變數間是否為獨立，並且選定一個最佳切點使得檢定統計量有最大值。然而此統計量已被證實不再是服從卡方分布，因此我們將採用Miller R. and Siegmund D. (1982)所提出的分配，應用至對應於最大化卡方統計量的邏輯斯迴歸(logistic regression)上。經由一系列的模擬實驗，我們降低檢定犯型一錯誤的比例。比較可惜的是，當解釋變數具相關性時，錯誤拒絕的比例無法維持在預設值0.05。本文中將藉由一筆實際的資料來說明修正型分配是如何運作的 ...
王冠翔, Wang, Guan-Siang
core  

How Does Cultural and Colonial Heritage Affect Optimal Branding Strategies? Evidence From the Rice Sector in Senegal

Agribusiness, EarlyView.
ABSTRACT Africa's cultural and colonial heritage has profoundly segmented rice markets. Whereas in ancient centers of rice domestication, consumers maintained preferences for local rice consistent with their cultural heritage, preferences have shifted toward imported Asian rice in coastal areas around seaports, due to prior exposure to colonial import ...
Kofi Britwum, Matty Demont
wiley   +1 more source