Long-term effects of family planning and other determinants of fertility on population and environment: agent-based modeling evidence from Wolong Nature Reserve, China

2010 ◽  
Vol 31 (6) ◽  
pp. 427-459 ◽  
Author(s):  
Li An ◽  
Jianguo Liu
2014 ◽  
pp. 179-208 ◽  
Author(s):  
James Devillers ◽  
Hugo Devillers ◽  
Axel Decourtye ◽  
Julie Fourrier ◽  
Pierrick Aupinel ◽  
...  

2019 ◽  
pp. 1-46 ◽  
Author(s):  
Philipp Harting

Do fiscal stabilization policies affect the long-term growth of the economy? If so, are the long-term effects growth enhancing or growth reducing? When addressing these questions from a theoretical perspective, the literature has typically emphasized the importance of structural aspects such as the modeling approach of endogenous technological change while paying less attention to an elaborate design of the considered fiscal stabilization policies. This paper uses an agent-based macroeconomic model that generates endogenous business cycles to emphasize the role of the policy design for long-term growth effects of stabilization policies. By comparing a demand-oriented consumption policy and two different investment subsidizing policies, it can be shown that these policies are successful in smoothing the business cycle but differ in terms of their effects on economic long-term growth. This highlights the importance of policy design for the analysis of long-term effects of stabilization policies.


2018 ◽  
Vol 10 (10) ◽  
pp. 3619 ◽  
Author(s):  
Camelia Delcea ◽  
Liviu-Adrian Cotfas ◽  
Nora Chiriță ◽  
Ionuț Nica

Boarding is one of the major processes of airplane turnaround time, with a direct influence on the airline companies’ costs. From a sustainable point of view, a faster completion of the boarding process has impact not only on the airline company’s long-term performance, but also on customers’ satisfaction and on the airport’s possibility of offering more services without additional investments in new infrastructure. Considering the airplane boarding strategies literature, it can be observed that the latest papers are dealing with developing faster boarding strategies, most of them considering boarding using just one-door of the aircraft. Even though boarding on one-door might be feasible for the airports having the needed infrastructure and sufficient jet-bridges, the situation is different in European airports, as the use of apron buses is fairly common. Moreover, some of the airline companies have adapted their boarding pass in order to reflect which door one should board once they get down from the bus. While using these buses, the boarding strategies developed in the literature are hard to find their applicability. Thus, a new method for boarding on two-door airplanes when apron buses are used is proposed and tested against the actual boarding method. A model is created in NetLogo 6.0.4, taking advantages of the agent-based modeling and used for simulations. The results show a boarding time reduction of 8.91%.


Author(s):  
Aaron B Frank

a. In 1973, the Department of Defense (DoD) created the Office of Net Assessment (ONA) with a charter and unique approach to strategic analysis. This approach questioned the suitability of systems analysis to assess long-term, dynamic competition between complex military organizations, and turned to more qualitative methods as analytic alternatives. Developments in computing technology and modeling methods over the last two decades, most notably agent-based modeling (ABM), provide new opportunities to address the central analytic questions that motivated the original development of net assessment as a distinctive practice of strategic analysis. By employing ABM to simulate and analyze the behavior of strategic, adaptive, boundedly rational actors, which have previously frustrated mathematical analysis, a new generation of computational models can provide opportunities to add rigor to net assessment.


2021 ◽  
Vol 118 (28) ◽  
pp. e2101160118
Author(s):  
Tania Barham ◽  
Brachel Champion ◽  
Andrew D. Foster ◽  
Jena D. Hamadani ◽  
Warren C. Jochem ◽  
...  

Family planning programs are believed to have substantial long-term benefits for women’s health and well-being, yet few studies have established either extent or direction of long-term effects. The Matlab, Bangladesh, maternal and child health/family planning (MCH/FP) program afforded a 12-y period of well-documented differential access to services. We evaluate its impacts on women’s lifetime fertility, adult health, and economic outcomes 35 y after program initiation. We followed 1,820 women who were of reproductive age during the differential access period (born 1938–1973) from 1978 to 2012 using prospectively collected data from the Matlab Health and Demographic Surveillance System and the 1996 and 2012 Matlab Health and Socioeconomic Surveys. We estimated intent-to-treat single-difference models comparing treatment and comparison area women. MCH/FP significantly increased contraceptive use, reduced completed fertility, lengthened birth intervals, and reduced age at last birth, but had no significant positive impacts on health or economic outcomes. Treatment area women had modestly poorer overall health (+0.07 SD) and respiratory health (+0.12 SD), and those born 1950–1961 had significantly higher body mass index (BMI) in 1996 (0.76 kg/m2) and 2012 (0.57 kg/m2); fewer were underweight in 1996, but more were overweight or obese in 2012. Overall, there was a +2.5 kg/m2 secular increase in BMI. We found substantial changes in lifetime contraceptive and fertility behavior but no long-term health or economic benefits of the program. We observed modest negative health impacts that likely result from an accelerated nutritional transition among treated women, a transition that would, in an earlier context, have been beneficial.


2010 ◽  
Vol 13 (7) ◽  
pp. A383-A384
Author(s):  
G Zauner ◽  
F Miksch ◽  
N Popper ◽  
G Endel ◽  
I Schiller-Frühwirth ◽  
...  

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