11 results on '"Niimi, Yoko"'
Search Results
2. Antagonistic regulation of the gibberellic acid response during stem growth in rice.
- Author
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Nagai, Keisuke, Mori, Yoshinao, Ishikawa, Shin, Furuta, Tomoyuki, Gamuyao, Rico, Niimi, Yoko, Hobo, Tokunori, Fukuda, Moyuri, Kojima, Mikiko, Takebayashi, Yumiko, Fukushima, Atsushi, Himuro, Yasuyo, Kobayashi, Masatomo, Ackley, Wataru, Hisano, Hiroshi, Sato, Kazuhiro, Yoshida, Aya, Wu, Jianzhong, Sakakibara, Hitoshi, and Sato, Yutaka
- Abstract
The size of plants is largely determined by growth of the stem. Stem elongation is stimulated by gibberellic acid1–3. Here we show that internode stem elongation in rice is regulated antagonistically by an 'accelerator' and a 'decelerator' in concert with gibberellic acid. Expression of a gene we name ACCELERATOR OF INTERNODE ELONGATION 1 (ACE1), which encodes a protein of unknown function, confers cells of the intercalary meristematic region with the competence for cell division, leading to internode elongation in the presence of gibberellic acid. By contrast, upregulation of DECELERATOR OF INTERNODE ELONGATION 1 (DEC1), which encodes a zinc-finger transcription factor, suppresses internode elongation, whereas downregulation of DEC1 allows internode elongation. We also show that the mechanism of internode elongation that is mediated by ACE1 and DEC1 is conserved in the Gramineae family. Furthermore, an analysis of genetic diversity suggests that mutations in ACE1 and DEC1 have historically contributed to the selection of shorter plants in domesticated populations of rice to increase their resistance to lodging, and of taller plants in wild species of rice for adaptation to growth in deep water. Our identification of these antagonistic regulatory factors enhances our understanding of the gibberellic acid response as an additional mechanism that regulates internode elongation and environmental fitness, beyond biosynthesis and gibberellic acid signal transduction. Stem growth in rice is regulated by an accelerator gene and a decelerator gene in parallel with gibberellic acid, and the opposite selection of these genes has led to adaptations to different environments. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
3. The Effect of the Recent Inheritance Tax Reform on Bequest Behaviour in Japan.
- Author
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Niimi, Yoko
- Subjects
TAX reform ,INHERITANCE & transfer tax ,CONSUMPTION (Economics) ,TAX deductions - Abstract
This paper examines the behavioural response of households to wealth transfer taxation using household survey data from Japan, with particular attention being paid to the implications of different bequest motives that households may have. The data reveal that relatively few households plan to reallocate the newly taxable amount of wealth to their own consumption or inter vivos transfers in response to the recent lowering of the basic deduction of the inheritance tax. Our analysis shows that this partly reflects the fact that a relatively large share of households have no or a weak bequest motive in Japan. However, our estimation results also suggest that parents with an altruistic bequest motive are more likely to avoid an increase in their children's tax bill by reallocating the newly taxable amount of wealth to inter vivos transfers than those with no or a weak bequest motive. By contrast, parents with an exchange bequest motive are more likely to respond to the tax reform by reallocating the newly taxable amount of wealth to their own consumption, though they seem to exhibit a similar response to those with an altruistic bequest motive in some cases. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
4. Do borrowing constraints matter for intergenerational educational mobility? Evidence from Japan*.
- Author
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Niimi, Yoko
- Subjects
INTERGENERATIONAL equity ,EDUCATIONAL mobility ,EDUCATIONAL attainment ,REGRESSION analysis - Abstract
This paper examines the intergenerational transmission of educational attainment using microdata for Japan. By exploiting unique information on whether children have ever given up schooling for financial reasons and, if they have, which level of schooling they have forgone, it assesses the role of borrowing constraints in determining intergenerational educational mobility in a more direct manner than previous attempts. Despite a steady increase in the level of educational attainment, the regression results indicate the absence of an increase in intergenerational educational mobility in postwar Japan. Moreover, while borrowing constraints used to play a significant role in lowering intergenerational educational mobility, they no longer seem to matter for the youngest cohort examined in this paper. Instead, our analysis shows that the relative importance of adolescent academic ability for children's educational attainment has increased in recent years, thereby underlining the increasing importance of earlier investments in children's human capital for their subsequent academic advancement. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
5. Public and private investment in human capital and intergenerational transfers in Asia: an overview.
- Author
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Horioka, Charles Yuji, Morgan, Peter J., and Niimi, Yoko
- Subjects
HUMAN capital ,INCOME inequality ,ECONOMIC development - Abstract
An introduction is presented in which the editor discusses articles in the issue on topics including impact of investment in human capital on economic growth; human capital in U.S.; and income inequality.
- Published
- 2018
- Full Text
- View/download PDF
6. The impact of intergenerational transfers on wealth inequality in Japan and the United States.
- Author
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Niimi, Yoko and Horioka, Charles Yuji
- Subjects
WEALTH ,INHERITANCE & succession ,RETIREMENT ,SAVINGS ,INCOME inequality - Abstract
Abstract: Our paper sheds light on the implications of intergenerational transfers for wealth inequality by examining whether or not individuals who receive intergenerational transfers from their parents are more likely to leave bequests to their children than those who do not using microdata for Japan and the United States. The estimation results show that the receipt of intergenerational transfers from parents and/or parents‐in‐law increases the likelihood of individuals leaving bequests to their children in both Japan and the United States, which in turn is likely to contribute to the persistence or widening of wealth disparities. However, such a tendency is found to be stronger among less better‐off households in both countries, and this may help alleviate the disequalising effect of intergenerational transfers on the distribution of wealth, at least to some extent. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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7. Aging in Asia: Introduction to Symposium.
- Author
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Horioka, Charles Yuji, Morgan, Peter J., Niimi, Yoko, and Wan, Guanghua
- Subjects
POPULATION aging ,OLDER people ,LABOR supply ,LABOR productivity ,ADULT education workshops ,ECONOMICS - Abstract
Abstract: Population aging (an increase in the share of the elderly in total population) is occurring in many, if not most, countries in the world, including those in Asia. Both economists and policymakers warn that population aging can have many deleterious effects on a country's economy including a decline in its saving rate, the emergence of a labor shortage, a deterioration in government finances owing to increased spending on old‐age related programs, and reduced innovation and productivity growth. It is therefore imperative for countries to prepare themselves for the advent of an aged society. The emerging and developing countries in Asia are no exception, with the region generally lacking adequate systems in such areas as long‐term care, public pensions, and health insurance. Against this background, an international workshop on “Aging in Asia” was held in Kitakyushu City, Japan, on November 15 to 16, 2016. The workshop was jointly sponsored by the Asian Development Bank Institute and the Asian Growth Research Institute and was organized by Charles Yuji Horioka, Peter J. Morgan, Yoko Niimi, and Guanghua Wan. This special issue of the Review includes nine papers presented at this workshop plus one paper that was not presented there but was written by one of the workshop participants. All of these papers underwent the usual rigorous refereeing process of this Review. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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8. Does providing informal elderly care hasten retirement? Evidence from Japan.
- Author
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Niimi, Yoko
- Subjects
CARE of aging parents ,ELDER care ,RETIREMENT age ,JAPANESE social conditions ,PARENT-adult child relationships ,SOCIAL conditions of older people - Abstract
Abstract: This paper examines the implications of providing care to elderly parents for adult children's retirement plans using micro data from a Japanese survey. We find no significant effect of caregiving on family caregivers’ planned retirement age if we do not take into account caregiving intensity but find a negative and significant effect on retirement plans for intensive caregivers, particularly among women. These findings suggest that relying on family members to provide elderly care can pose a serious challenge to the ongoing efforts of the government to promote the labor supply of women and the elderly as a way of addressing the shrinkage of the working‐age population in Japan. The estimation results suggest that ensuring access to formal care services can help family members reconcile their paid work with caregiving requirements, thereby alleviating the adverse effect of caregiving on their retirement plans. The results also suggest that the financial burden of formal care services could require caregivers to postpone retirement in some cases. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
9. What Affects Happiness Inequality? Evidence from Japan.
- Author
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Niimi, Yoko
- Subjects
HAPPINESS ,INCOME inequality ,HOUSEHOLD surveys ,EMPLOYMENT - Abstract
This paper examines the determinants of happiness inequality in Japan using unique data from the “Preference Parameters Study” of Osaka University, a nationally representative survey conducted in Japan. By estimating Recentered Influence Function regressions, we find that household income has a negative and significant effect on happiness inequality, as found for other advanced economies, though people’s perception of their relative standing in the income spectrum also matters for the dispersion of happiness. Moreover, the regression results show that the insecurity faced by people about their jobs and life after retirement is also significantly associated with the widening of happiness inequality. Such findings are cause for grave concern given that the share of irregular jobs, which tend to be low paid and insecure, in total employment significantly increased in Japan during the Lost Two Decades and that this increasing trend has not yet been reversed. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
- View/download PDF
10. The 'Costs' of informal care: an analysis of the impact of elderly care on caregivers' subjective well-being in Japan.
- Author
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Niimi, Yoko
- Subjects
ELDER care ,OLDER caregivers ,WELL-being ,PARENTS-in-law - Abstract
This paper examines the impact of providing informal care to elderly parents on caregivers' subjective well-being using unique data from the 'Preference Parameters Study' of Osaka University, a nationally representative survey conducted in Japan. The estimation results indicate heterogeneous effects: while informal elderly care does not have a significant impact on the happiness level of married caregivers regardless of whether they take care of their own parents or parents-in-law and whether or not they reside with them, it has a negative and significant impact on the happiness level of unmarried caregivers. These findings call for more attention to be paid to unmarried caregivers, who presumably receive less support from family members and tend to be more vulnerable to negative income shocks than their married counterparts. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
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11. GENDER DIFFERENCES IN REMITTANCE BEHAVIOR:: EVIDENCE FROM VIETNAM.
- Author
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NIIMI, YOKO and REILLY, BARRY
- Subjects
GENDER differences (Psychology) ,REMITTANCES ,HOMOSCEDASTICITY ,HETEROSCEDASTICITY ,INTERNAL migration ,IMMIGRANTS ,ECONOMICS - Abstract
This paper investigates the role of gender in remittance behavior among migrants using the 2004 Vietnam Migration Survey data. The gender dimension to remittance behavior has not featured strongly in the existing literature and our findings thus contain novel appeal. In addition, we use estimates from both homoscedastic and heteroscedastic tobit models to decompose the raw gender difference in remittances into treatment and endowment components. We find little evidence that gender differences in remittances are attributable to behavioral differences between men and women, and this finding is invariant to whether the homoscedastic or heteroscedastic tobit is used in estimation. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
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