title: Improving estimates of inequality and poverty from urban China’s household income and expenditure survey

authors: Gibson, John

subjects: income distribution

abstract: In urban China the Household Income and Expenditure Survey requires respondents to keep a daily expenditure diary for a full 12-month period. This onerous reporting task makes it difficult to recruit households into the survey, compromising the representative nature of the sample. In this article we use data on the monthly expenditures of households from two urban areas of China to see if data collection short-cuts, such as extrapolating to annual totals from expenditure reports in only some months of the year, would harm the accuracy of annual expenditure, inequality and poverty estimates. Our results show that replacing 12-month diaries with simple extrapolations from either one, two, four or six months would cause a sharp increase in estimates of annual inequality and poverty. This finding also undermines international comparisons of inequality statistics because no country other than China uses such comprehensive 12-month expenditure records. But a corrected form of extrapolation, based on correlations between the same household’s expenditures in different months of the year, gives much smaller errors in estimates of inequality and poverty.

text: Improving estimates of inequality and poverty from urban China’s household income and expenditure survey In urban China the Household Income and Expenditure Survey requires respondents to keep a daily expenditure diary for a full 12-month period. This onerous reporting task makes it difficult to recruit households into the survey, compromising the representative nature of the sample. In this article we use data on the monthly expenditures of households from two urban areas of China to see if data collection short-cuts, such as extrapolating to annual totals from expenditure reports in only some months of the year, would harm the accuracy of annual expenditure, inequality and poverty estimates. Our results show that replacing 12-month diaries with simple extrapolations from either one, two, four or six months would cause a sharp increase in estimates of annual inequality and poverty. This finding also undermines international comparisons of inequality statistics because no country other than China uses such comprehensive 12-month expenditure records. But a corrected form of extrapolation, based on correlations between the same household’s expenditures in different months of the year, gives much smaller errors in estimates of inequality and poverty.

year: 2002-01

title: Genome-wide analysis reveals distinct global populations of pink bollworm (Pectinophora gossypiella)

authors: Matheson, Paige

subjects: Humans

abstract: The pink bollworm (Pectinophora gossypiella) is one of the world's most destructive pests of cotton. This invasive lepidopteran occurs in nearly all cotton-growing countries. Its presence in the Ord Valley of North West Australia poses a potential threat to the expanding cotton industry there. To assess this threat and better understand population structure of pink bollworm, we analysed genomic data from individuals collected in the field from North West Australia, India, and Pakistan, as well as from four laboratory colonies that originated in the United States. We identified single nucleotide polymorphisms (SNPs) using a reduced-representation, genotyping-by-sequencing technique (DArTseq). The final filtered dataset included 6355 SNPs and 88 individual genomes that clustered into five groups: Australia, India-Pakistan, and three groups from the United States. We also analysed sequences from Genbank for mitochondrial DNA (mtDNA) locus cytochrome c oxidase I (COI) for pink bollworm from six countries. We found low genetic diversity within populations and high differentiation between populations from different continents. The high genetic differentiation between Australia and the other populations and colonies sampled in this study reduces concerns about gene flow to North West Australia, particularly from populations in India and Pakistan that have evolved resistance to transgenic insecticidal cotton. We attribute the observed population structure to pink bollworm's narrow host plant range and limited dispersal between continents.

text: Genome-wide analysis reveals distinct global populations of pink bollworm (Pectinophora gossypiella) The pink bollworm (Pectinophora gossypiella) is one of the world's most destructive pests of cotton. This invasive lepidopteran occurs in nearly all cotton-growing countries. Its presence in the Ord Valley of North West Australia poses a potential threat to the expanding cotton industry there. To assess this threat and better understand population structure of pink bollworm, we analysed genomic data from individuals collected in the field from North West Australia, India, and Pakistan, as well as from four laboratory colonies that originated in the United States. We identified single nucleotide polymorphisms (SNPs) using a reduced-representation, genotyping-by-sequencing technique (DArTseq). The final filtered dataset included 6355 SNPs and 88 individual genomes that clustered into five groups: Australia, India-Pakistan, and three groups from the United States. We also analysed sequences from Genbank for mitochondrial DNA (mtDNA) locus cytochrome c oxidase I (COI) for pink bollworm from six countries. We found low genetic diversity within populations and high differentiation between populations from different continents. The high genetic differentiation between Australia and the other populations and colonies sampled in this study reduces concerns about gene flow to North West Australia, particularly from populations in India and Pakistan that have evolved resistance to transgenic insecticidal cotton. We attribute the observed population structure to pink bollworm's narrow host plant range and limited dispersal between continents.

year: 2023-07-20

title: Words on Walls: Te reo Māori (loan)words in Aotearoa New Zealand primary school classrooms

authors: Burnette, Jessie

abstract: The unique language contact situation within Aotearoa New Zealand has informed a range of studies of the defining and increasingly salient feature of New Zealand English (NZE): the integration of loanwords from the indigenous, donor language, te reo Māori, into the dominant recipient language, English (Hay et al. 2008). As NZE is experiencing a state of great lexical flux, it is important to establish which (loan)words children are regularly exposed to and what social meanings they may be acquiring in relation to these. One relevant domain that can be examined for this purpose is that of the classroom. The classroom is educational in the traditional sense, but also in the developmental sense, in the acquisition of broader social meaning. Previous schoolscape research has highlighted not only the pedagogical importance of these spaces, but their influence in the construction and transmission of language ideologies (Pzymus and Huddleston 2021; Brown 2012). The present study aims to answer two questions: RQ1) Which (loan)words are children regularly exposed to through schoolscapes in Aotearoa (and do these words align with the loanwords identified as frequently appearing in previously collected corpora)? RQ2) What implicit language ideologies does the presentation of loanwords display (e.g. are loanwords presented as ‘flagged’/foreign (Levendis and Calude 2019))? This study brings together quantitative and qualitative analysis methods in an in-depth investigation of nine classrooms within three separate primary schools, and aims to provide a broad and perationalizable framework for conducting LL.

text: Words on Walls: Te reo Māori (loan)words in Aotearoa New Zealand primary school classrooms The unique language contact situation within Aotearoa New Zealand has informed a range of studies of the defining and increasingly salient feature of New Zealand English (NZE): the integration of loanwords from the indigenous, donor language, te reo Māori, into the dominant recipient language, English (Hay et al. 2008). As NZE is experiencing a state of great lexical flux, it is important to establish which (loan)words children are regularly exposed to and what social meanings they may be acquiring in relation to these. One relevant domain that can be examined for this purpose is that of the classroom. The classroom is educational in the traditional sense, but also in the developmental sense, in the acquisition of broader social meaning. Previous schoolscape research has highlighted not only the pedagogical importance of these spaces, but their influence in the construction and transmission of language ideologies (Pzymus and Huddleston 2021; Brown 2012). The present study aims to answer two questions: RQ1) Which (loan)words are children regularly exposed to through schoolscapes in Aotearoa (and do these words align with the loanwords identified as frequently appearing in previously collected corpora)? RQ2) What implicit language ideologies does the presentation of loanwords display (e.g. are loanwords presented as ‘flagged’/foreign (Levendis and Calude 2019))? This study brings together quantitative and qualitative analysis methods in an in-depth investigation of nine classrooms within three separate primary schools, and aims to provide a broad and perationalizable framework for conducting LL.

year: 2024