David Lam
Dados Biográficos
| ID | 317464 |
|---|---|
| NOME | David Lam |
| PRENOMES | David |
| SOBRENOME | Lam |
| ASSINATURA | LAM D |
| AFILIAÇÕES | University of Michigan |
| ORCID | 0000-0002-1765-4532 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 30 |
| TOTAL DE CITAÇÕES | 327 |
| TOTAL COMO AUTOR | 30 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1984 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2025 |
| ÍNDICE H | 12 |
The Next 2 Billion
The UN projects that world population will peak at 10.3 billion in 2084, a 2.1 billion increase from 2024. Can the world provide food, water, and other resources to 10.3 billion people? How will additional population exacerbate resource challenges and worsen climate change? This paper analyzes these questions by looking at the last 60 years and by simulating the future impact of population growth and rising incomes on food, water, energy, and CO2…
Draw & Doodle Simulation
EDUCATIONAL CHALLENGE: Electronic dance music (EDM) festivals - crowded, loud, low-resource environments - pose unique challenges to event medical teams. Simulation can prepare teams to manage clinical presentations in this unconventional context. Without access to simulation infrastructure, a low-technological, low-fidelity simulation modality is warranted. SOLUTION: Draw & Doodle Simulation (D&D SIM) is a low-fidelity simulation where patients …
Has the world survived the population bomb? A 10-year update
What factors enable social-ecological transformative potential? The role of learning practices, empowerment, and networking
Achieving sustainability in the Anthropocene requires radical changes to how human societies operate. The Seeds of Good Anthropocenes (SOGA) project has identified a diverse set of existing initiatives, called “seeds,” that have the potential to catalyze transformations toward more sustainable pathways. However, the empirical investigation of factors and conditions that enable successful sustainability transformations across multiple cases has be…
Development of the Hong Kong Sign Language Sentence Repetition Test
This paper presents the design and development of the Hong Kong Sign Language-Sentence Repetition Test (HKSL-SRT). It will be argued that the test offers evidence of discriminability, reliability, as well as practicality and can serve as an effective global measurement of individuals' proficiency in HKSL. The full version of the test consists of 40 signed sentences of increasing length and complexity. Specifically, we will evaluate the manual and…
Schooling inequality, returns to schooling, and earnings inequality
Human capital models imply that both the distribution of education and returns to education affect earnings inequality. Decomposition of these ‘quantity’ and ‘price’ components have been important in understanding changes in earnings inequality in developed and developing countries. This paper provides theoretical and empirical analysis of the interactions between schooling inequality, returns to schooling and earnings inequality. We focus on two…
Reply to Stan Becker, “Has the World Really Survived the Population Bomb? (Commentary on “How the World Survived the Population Bomb
The Influence of Older Classmates on Adolescent Sexual Behavior in Cape Town, South Africa
This study examines the influence of exposure to older within‐grade peers on sexual behavior among students in urban South Africa. Data are drawn from the Cape Area Panel Study, a longitudinal survey of young people conducted in metropolitan Cape Town from 2002 to 2006. The combination of early sexual debut, high rates of school enrollment into the late teens, and grade repetition create an environment in which young people who progress through s…
How the World Survived the Population Bomb
The world population will reach 7 billion in late 2011, a demographic milestone that is causing renewed attention to the challenges caused by population growth. This article looks at the last 50 years of demographic change, one of the most extraordinary periods in demographic history. During this period, world population grew at rates that have never been seen before and will almost surely never be seen again. There were many concerns about the p…
Schooling as a lottery
Sexual Behavior, Pregnancy, and Schooling Among Young People in Urban South Africa
This study examines transitions in schooling, sexual activity, and pregnancy among adolescents and young adults in urban South Africa. Data are analyzed from the Cape Area Panel Study (CAPS), a recently collected longitudinal survey of young adults and their families in metropolitan Cape Town. We find that teen pregnancy is not entirely inconsistent with continued schooling, especially for African (black) women. More than 50 percent of African wo…
Stages of the Demographic Transition from a Child's Perspective
This article provides a new characterization of stages of the demographic transition from the perspective of children competing for resources within families and cohorts. In Stage 1 falling mortality increases the size of both families and birth cohorts. In Stage 2 falling fertility overtakes falling mortality to reduce family size, but population momentum causes continued growth in cohort size. In Stage 3 falling fertility overtakes population m…
Effects of economic shocks on children's employment and schooling in Brazil
Smoking behaviours and attitudes among male restaurant workers in Boston's Chinatown
Despite high rates of smoking, Chinese American restaurant workers were generally aware of the health risks and were interested in quitting. Community based research can set the stage for targeted public health efforts to reduce smoking in immigrant communities
Causes and consequences of schooling outcomes in South Africa
The Population Studies Center (PSC) at the University of Michigan is one of the oldest population centers in the United States. Established in 1961 with a grant from the Ford Foundation, the Center has a rich history as the main workplace for an interdisciplinary community of scholars in the field of population studies. Today the Center is supported by a Population Research Center Core Grant from the National Institute of Child Health and Human D…
Paternal Care by Genetic Fathers and Stepfathers II
Effects of Schooling on Fertility, Labor Supply, and Investments in Children, with Evidence from Brazil
We explore the mechanisms driving the negative relationship between parents' schooling and fertility. Brazilian data demonstrate strong negative effects of women's schooling on fertility over the first eight years of schooling. We observe no increase in women's labor supply, however, in spite of rapidly rising wages, suggesting that reservation wages rise as fast as market wages over this range. We find strong effects of parental schooling on chi…
Family size and children’s education in Vietnam
Data from the nationally representative 1994 Inter-Censal Demographic Survey are used to examine the association between family size and children s schooling in Vietnam. The data provide information on several education measures for all children over age 10, including children no longer residing in the household. Although a clear inverse bivariate association between family size and children s school attendance and educational attainment is evide…
The Fertility Transition in Latin America
The effects of temperature on human fertility
Monthly birth and temperature data for a variety of states and countries are used to estimate the effect of short-run temperature fluctuations on fertility. Regressions of monthly births on a flexible specification of lagged monthly temperature show that temperature has quantitatively important effects on both seasonal and nonseasonal variation in births. Summer temperature extremes reduce conceptions in the southern United States, explaining a s…
Modeling Seasonality in Fecundability, Conceptions, and Births
This paper develops a model of seasonal fluctuations in fecundability, conceptions, and births. We begin with a model of individual fecundability that combines behavioral and biological components, with particular attention to the roles of coital frequency, sperm concentration, fetal loss, and contraception. The individual-level model is then expanded into a model of seasonal fluctuations in births at the population level, which accounts explicit…
Comment on Preston and Campbell's "Differential Fertility and the Distribution of Traits"
Effects of Family Background on Earnings and Returns to Schooling
The authors investigate whether omitted family background variables are responsible for high returns to schooling estimated in Brazil. Returns to schooling fall by about one-third when parental schooling is added to wage equations. Surprisingly, the schooling of fathers-in-law has larger effects on wages than the schooling of fathers. On the basis of a model of assortative mating, the authors interpret this as evidence that parental characteristi…
Convergent Issues in Genetics and Demography
J.Adams: Introduction: Genetics and demography and historical information M.Livi-Bacci: Macro versus micro E. Thompson: From history to genes: from genes to history E.E. Castilla & J. Adams: Migration and genetic structure in an isolated population in Argentina: Aicuna P.W. Leslie: Demographic behavior, mating patterns and the distribution of inbreeding A. Piazza: Migration and genetic differentiation in Italy D. Lam & P.E. Smouse: Heterogenous f…
Age, Experience, and Schooling
This article analyzes age and experience profiles of earnings inequality for U.S. and Brazilian males. Decomposition of the inequality profiles using a standard human capital earnings equation clarifies the determinants of cross-sectional inequality profiles and demonstrates a number of important differences in the shape of the two countries' profiles and in their underlying components. Most dramatic are Brazil's higher returns to schooling and h…
Effects of economic shocks on children's employment and schooling in Brazil
Effects of Family Background on Earnings and Returns to Schooling
The authors investigate whether omitted family background variables are responsible for high returns to schooling estimated in Brazil. Returns to schooling fall by about one-third when parental schooling is added to wage equations. Surprisingly, the schooling of fathers-in-law has larger effects on wages than the schooling of fathers. On the basis of a model of assortative mating, the authors interpret this as evidence that parental characteristi…
The effects of temperature on human fertility
Monthly birth and temperature data for a variety of states and countries are used to estimate the effect of short-run temperature fluctuations on fertility. Regressions of monthly births on a flexible specification of lagged monthly temperature show that temperature has quantitatively important effects on both seasonal and nonseasonal variation in births. Summer temperature extremes reduce conceptions in the southern United States, explaining a s…
Family size and children’s education in Vietnam
Data from the nationally representative 1994 Inter-Censal Demographic Survey are used to examine the association between family size and children s schooling in Vietnam. The data provide information on several education measures for all children over age 10, including children no longer residing in the household. Although a clear inverse bivariate association between family size and children s school attendance and educational attainment is evide…
How the World Survived the Population Bomb
The world population will reach 7 billion in late 2011, a demographic milestone that is causing renewed attention to the challenges caused by population growth. This article looks at the last 50 years of demographic change, one of the most extraordinary periods in demographic history. During this period, world population grew at rates that have never been seen before and will almost surely never be seen again. There were many concerns about the p…
Sexual Behavior, Pregnancy, and Schooling Among Young People in Urban South Africa
This study examines transitions in schooling, sexual activity, and pregnancy among adolescents and young adults in urban South Africa. Data are analyzed from the Cape Area Panel Study (CAPS), a recently collected longitudinal survey of young adults and their families in metropolitan Cape Town. We find that teen pregnancy is not entirely inconsistent with continued schooling, especially for African (black) women. More than 50 percent of African wo…
Stages of the Demographic Transition from a Child's Perspective
This article provides a new characterization of stages of the demographic transition from the perspective of children competing for resources within families and cohorts. In Stage 1 falling mortality increases the size of both families and birth cohorts. In Stage 2 falling fertility overtakes falling mortality to reduce family size, but population momentum causes continued growth in cohort size. In Stage 3 falling fertility overtakes population m…
Modeling Seasonality in Fecundability, Conceptions, and Births
This paper develops a model of seasonal fluctuations in fecundability, conceptions, and births. We begin with a model of individual fecundability that combines behavioral and biological components, with particular attention to the roles of coital frequency, sperm concentration, fetal loss, and contraception. The individual-level model is then expanded into a model of seasonal fluctuations in births at the population level, which accounts explicit…
Schooling as a lottery
Causes and consequences of schooling outcomes in South Africa
The Population Studies Center (PSC) at the University of Michigan is one of the oldest population centers in the United States. Established in 1961 with a grant from the Ford Foundation, the Center has a rich history as the main workplace for an interdisciplinary community of scholars in the field of population studies. Today the Center is supported by a Population Research Center Core Grant from the National Institute of Child Health and Human D…
Declining inequality in schooling in Brazil and its effects on inequality in earnings
Age, Experience, and Schooling
This article analyzes age and experience profiles of earnings inequality for U.S. and Brazilian males. Decomposition of the inequality profiles using a standard human capital earnings equation clarifies the determinants of cross-sectional inequality profiles and demonstrates a number of important differences in the shape of the two countries' profiles and in their underlying components. Most dramatic are Brazil's higher returns to schooling and h…
The Influence of Older Classmates on Adolescent Sexual Behavior in Cape Town, South Africa
This study examines the influence of exposure to older within‐grade peers on sexual behavior among students in urban South Africa. Data are drawn from the Cape Area Panel Study, a longitudinal survey of young people conducted in metropolitan Cape Town from 2002 to 2006. The combination of early sexual debut, high rates of school enrollment into the late teens, and grade repetition create an environment in which young people who progress through s…
Seasonality of births in human populations
Seasonal fluctuations in births have been observed in virtually all human populations. In this paper we re-examine the seasonality of births with two main objectives in mind. The first is to provide an overview of the basic facts about the seasonality of births, presenting new estimates of the seasonal patterns. Seasonality is an important if not dominant source of nontrend variation in births in virtually all populations, but there are dramatic …
The Next 2 Billion
The UN projects that world population will peak at 10.3 billion in 2084, a 2.1 billion increase from 2024. Can the world provide food, water, and other resources to 10.3 billion people? How will additional population exacerbate resource challenges and worsen climate change? This paper analyzes these questions by looking at the last 60 years and by simulating the future impact of population growth and rising incomes on food, water, energy, and CO2…
What factors enable social-ecological transformative potential? The role of learning practices, empowerment, and networking
Achieving sustainability in the Anthropocene requires radical changes to how human societies operate. The Seeds of Good Anthropocenes (SOGA) project has identified a diverse set of existing initiatives, called “seeds,” that have the potential to catalyze transformations toward more sustainable pathways. However, the empirical investigation of factors and conditions that enable successful sustainability transformations across multiple cases has be…
Population growth, age structure, and age-specific productivity
The variance of population characteristics in stable populations, with applications to the distribution of income
Stable population theory has recently been used to analyse the effects of changes in fertility and mortality on economic variables such as income per head. In this paper more general results are derived to describe the effects of changing vital rates on the variance and higher moments of the distribution of some age-dependent variable. Simple analytical expressions are derived which decompose the effects of changes in age structure into the effec…
The variance of population characteristics in stable populations, with applications to the distribution of income
Stable population theory has recently been used to analyse the effects of changes in fertility and mortality on economic variables such as income per head. In this paper more general results are derived to describe the effects of changing vital rates on the variance and higher moments of the distribution of some age-dependent variable. Simple analytical expressions are derived which decompose the effects of changes in age structure into the effec…
Marriage Markets and Assortative Mating with Household Public Goods
David Lam, Marriage Markets and Assortative Mating with Household Public Goods: Theoretical Results and Empirical Implications, The Journal of Human Resources, Vol. 23, No. 4 (Autumn, 1988), pp. 462-487
Population growth, age structure, and age-specific productivity
Declining inequality in schooling in Brazil and its effects on inequality in earnings
Seasonality of births in human populations
Seasonal fluctuations in births have been observed in virtually all human populations. In this paper we re-examine the seasonality of births with two main objectives in mind. The first is to provide an overview of the basic facts about the seasonality of births, presenting new estimates of the seasonal patterns. Seasonality is an important if not dominant source of nontrend variation in births in virtually all populations, but there are dramatic …
Convergent Issues in Genetics and Demography
J.Adams: Introduction: Genetics and demography and historical information M.Livi-Bacci: Macro versus micro E. Thompson: From history to genes: from genes to history E.E. Castilla & J. Adams: Migration and genetic structure in an isolated population in Argentina: Aicuna P.W. Leslie: Demographic behavior, mating patterns and the distribution of inbreeding A. Piazza: Migration and genetic differentiation in Italy D. Lam & P.E. Smouse: Heterogenous f…
Age, Experience, and Schooling
This article analyzes age and experience profiles of earnings inequality for U.S. and Brazilian males. Decomposition of the inequality profiles using a standard human capital earnings equation clarifies the determinants of cross-sectional inequality profiles and demonstrates a number of important differences in the shape of the two countries' profiles and in their underlying components. Most dramatic are Brazil's higher returns to schooling and h…
Comment on Preston and Campbell's "Differential Fertility and the Distribution of Traits"
Effects of Family Background on Earnings and Returns to Schooling
The authors investigate whether omitted family background variables are responsible for high returns to schooling estimated in Brazil. Returns to schooling fall by about one-third when parental schooling is added to wage equations. Surprisingly, the schooling of fathers-in-law has larger effects on wages than the schooling of fathers. On the basis of a model of assortative mating, the authors interpret this as evidence that parental characteristi…
Modeling Seasonality in Fecundability, Conceptions, and Births
This paper develops a model of seasonal fluctuations in fecundability, conceptions, and births. We begin with a model of individual fecundability that combines behavioral and biological components, with particular attention to the roles of coital frequency, sperm concentration, fetal loss, and contraception. The individual-level model is then expanded into a model of seasonal fluctuations in births at the population level, which accounts explicit…
The effects of temperature on human fertility
Monthly birth and temperature data for a variety of states and countries are used to estimate the effect of short-run temperature fluctuations on fertility. Regressions of monthly births on a flexible specification of lagged monthly temperature show that temperature has quantitatively important effects on both seasonal and nonseasonal variation in births. Summer temperature extremes reduce conceptions in the southern United States, explaining a s…
The Fertility Transition in Latin America
Family size and children’s education in Vietnam
Data from the nationally representative 1994 Inter-Censal Demographic Survey are used to examine the association between family size and children s schooling in Vietnam. The data provide information on several education measures for all children over age 10, including children no longer residing in the household. Although a clear inverse bivariate association between family size and children s school attendance and educational attainment is evide…
Paternal Care by Genetic Fathers and Stepfathers II
Effects of Schooling on Fertility, Labor Supply, and Investments in Children, with Evidence from Brazil
We explore the mechanisms driving the negative relationship between parents' schooling and fertility. Brazilian data demonstrate strong negative effects of women's schooling on fertility over the first eight years of schooling. We observe no increase in women's labor supply, however, in spite of rapidly rising wages, suggesting that reservation wages rise as fast as market wages over this range. We find strong effects of parental schooling on chi…
Causes and consequences of schooling outcomes in South Africa
The Population Studies Center (PSC) at the University of Michigan is one of the oldest population centers in the United States. Established in 1961 with a grant from the Ford Foundation, the Center has a rich history as the main workplace for an interdisciplinary community of scholars in the field of population studies. Today the Center is supported by a Population Research Center Core Grant from the National Institute of Child Health and Human D…
Smoking behaviours and attitudes among male restaurant workers in Boston's Chinatown
Despite high rates of smoking, Chinese American restaurant workers were generally aware of the health risks and were interested in quitting. Community based research can set the stage for targeted public health efforts to reduce smoking in immigrant communities
Effects of economic shocks on children's employment and schooling in Brazil
Sexual Behavior, Pregnancy, and Schooling Among Young People in Urban South Africa
This study examines transitions in schooling, sexual activity, and pregnancy among adolescents and young adults in urban South Africa. Data are analyzed from the Cape Area Panel Study (CAPS), a recently collected longitudinal survey of young adults and their families in metropolitan Cape Town. We find that teen pregnancy is not entirely inconsistent with continued schooling, especially for African (black) women. More than 50 percent of African wo…
Stages of the Demographic Transition from a Child's Perspective
This article provides a new characterization of stages of the demographic transition from the perspective of children competing for resources within families and cohorts. In Stage 1 falling mortality increases the size of both families and birth cohorts. In Stage 2 falling fertility overtakes falling mortality to reduce family size, but population momentum causes continued growth in cohort size. In Stage 3 falling fertility overtakes population m…
Schooling as a lottery
How the World Survived the Population Bomb
The world population will reach 7 billion in late 2011, a demographic milestone that is causing renewed attention to the challenges caused by population growth. This article looks at the last 50 years of demographic change, one of the most extraordinary periods in demographic history. During this period, world population grew at rates that have never been seen before and will almost surely never be seen again. There were many concerns about the p…
Reply to Stan Becker, “Has the World Really Survived the Population Bomb? (Commentary on “How the World Survived the Population Bomb
The Influence of Older Classmates on Adolescent Sexual Behavior in Cape Town, South Africa
This study examines the influence of exposure to older within‐grade peers on sexual behavior among students in urban South Africa. Data are drawn from the Cape Area Panel Study, a longitudinal survey of young people conducted in metropolitan Cape Town from 2002 to 2006. The combination of early sexual debut, high rates of school enrollment into the late teens, and grade repetition create an environment in which young people who progress through s…
Schooling inequality, returns to schooling, and earnings inequality
Human capital models imply that both the distribution of education and returns to education affect earnings inequality. Decomposition of these ‘quantity’ and ‘price’ components have been important in understanding changes in earnings inequality in developed and developing countries. This paper provides theoretical and empirical analysis of the interactions between schooling inequality, returns to schooling and earnings inequality. We focus on two…
Demography (18 obras) · Sociology (16 obras) · Population (14 obras) · Demographic economics (11 obras) · Demography (11 obras) · Economics (11 obras) · Geography (11 obras) · Poverty, Education, and Child Welfare (10 obras) · Medicine (9 obras) · Mathematics (8 obras)