Results 31 to 40 of about 23,969,272 (337)

Including autapomorphies is important for paleontological tip-dating with clocklike data, but not with non-clock data [PDF]

open access: yesPeerJ, 2018
Tip-dating, where fossils are included as dated terminal taxa in Bayesian dating inference, is an increasingly popular method. Data for these studies often come from morphological character matrices originally developed for non-dated, and usually ...
Nicholas J. Matzke, Randall B. Irmis
doaj   +2 more sources

Backbone phylogeny of Lepisorus (Polypodiaceae) and a novel infrageneric classification based on the total evidence from plastid and morphological data

open access: yesCladistics, 2020
The fern genus Lepisorus represents one of the most complicated and controversial lineages in Polypodiaceae, with about 80 species which have been classified into several separate genera, and is notorious for its taxonomic difficulty. Despite progress in
Cunfeng Zhao   +3 more
semanticscholar   +1 more source

Recessions and total factor productivity: Evidence from sectoral data

open access: yesEconomic Modelling, 2021
The recent COVID-19 crisis has generated a concern that productivity (which was already at historically low levels) may further decline. From a theoretical standpoint, the recessions-total factor productivity (TFP) nexus is ambiguous à priori. This paper empirically examines the dynamic impact of recessions on TFP.
Furceri, Davide   +3 more
openaire   +2 more sources

The philosophy of total evidence and its relevance for phylogenetic inference

open access: yesPapéis Avulsos de Zoologia, 2005
The test of congruence under total evidence as used in systematics has been tied to a Popperian philosophy of science, but is here shown to be related to the coherence theory of truth in metaphysics and thus to coherentism in epistemology. Since the test
Olivier Rieppel
doaj   +1 more source

Does ESG performance promote total factor productivity? Evidence from China

open access: yesFrontiers in Ecology and Evolution, 2022
Currently, environmental, social, and corporate governance (ESG) has become an all-pervasive term in the industrial sector, owing to its significant impact on corporate decision-making.
Jiangming Ma, Di Gao, Jing Sun
doaj   +1 more source

Combining morphology and molecular data to improve Drosophila paulistorum (Diptera, Drosophilidae) taxonomic status

open access: yesFly, 2018
The willistoni species subgroup has been the subject of several studies since the latter half of the past century and is considered a Neotropical model for evolutionary studies, given the many levels of reproductive isolation and different evolutionary ...
Rebeca Zanini   +5 more
doaj   +1 more source

Parsimony and Model-Based Analyses of Indels in Avian Nuclear Genes Reveal Congruent and Incongruent Phylogenetic Signals

open access: yesBiology, 2013
Insertion/deletion (indel) mutations, which are represented by gaps in multiple sequence alignments, have been used to examine phylogenetic hypotheses for some time.
Frederick H. Sheldon   +14 more
doaj   +1 more source

Hypothetico-deductivism in systematics: fact or fiction?

open access: yesPapéis Avulsos de Zoologia, 2008
Phylogenetic systematics (the cladistic analysis of phylogenetic relationships) is not hypotheticodeductively structured (in the sense of a covering law model of scientific explanation).
Olivier Rieppel
doaj   +1 more source

Unpacking Total Factor Productivity on Dairy Farms Using Empirical Evidence

open access: yesAgriculture, 2022
This study examines the farm-level factors that influence differences in total factor productivity (TFP) on dairy farms. To this end, a fixed-effects regression approach is applied to panel data for dairy farms obtained from the Farm Accountancy Data ...
Kehinde Oluseyi Olagunju   +3 more
doaj   +1 more source

Trade composition and total factor productivity: evidence for Chile [PDF]

open access: yes, 2005
This paper examines the long-run impact of capital goods imports, intermediate goods imports, and exports of manufactured and primary goods on total factor productivity in Chile.
Herzer, Dierk
core   +3 more sources

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