The Relationship between Tenure Legalization and Housing Improvements: Evidence from Mexico City

Varley, Ann

doi:10.1111/j.1467-7660.1987.tb00281.x

Cited by 74 publications

(90 citation statements)

References 10 publications

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“…Deininger, 2003;De Soto, 2000;World Bank, 1993), while others have argued that perceived rather than legal tenure security is a more important mechanism driving housing investment (e.g. Broegaard, 2005;Gilbert 2002Gilbert , 1994Payne, 2002Payne, , 2001Razzaz, 1993;Turner, 1976;Varley, 1987). Even though the latter notion is gaining ground in current habitat discourse, most studies are silent about the nature of the concept of perceived tenure security nor is the actual strength of its relationship with housing improvement considered.…”

Section: Introductionmentioning

confidence: 95%

Feeling and thinking: Quantifying the relationship between perceived tenure security and housing improvement in an informal neighbourhood in Buenos Aires

Gelder

2007

Habitat International

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Section: Introductionmentioning

confidence: 95%

Feeling and thinking: Quantifying the relationship between perceived tenure security and housing improvement in an informal neighbourhood in Buenos Aires

Gelder

2007

Habitat International

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“…Some experimental result of the GT/~+ decay of 76Sr to lower-lying states of the daughter nucleus, 76 37Rb39, can be found in [6]. The observed small excitation energy [7] of the first 2 + state, 709, 261 and 290 keV in 72Kr, 76Sr and 8~ respectively, already suggests that these nuclei are deformed, though a direct experimental information on the shape is not yet available. Those nuclei are predicted to be deformed according to various theoretical calculations [8,9].…”

mentioning

confidence: 93%

Dependence of Gamow-Teller? +-decay of80Zr,76Sr and72Kr on nuclear shape

Hamamoto

Zhang

1995

Z. Physik A - Hadrons and Nuclei

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Abstract. The Gamow-Teller (GT)/3 +-decay probability is estimated for three neutron-deficient N = Z nuclei, 76 8OZr ~Kr36, 38Sr38, and 4o 4o, using a quasiparticle TammDancoff approximation (TDA) based on a Skyrme-type deformed Hartree-Fock (HF) calculation. The distribution of the GT strength is found to depend sensitively on the nuclear shape, namely, a spherical shape or a prolate or an oblate deformation of the obtained HF minima. At the shape of the lowest HF minimum about a half of the calculated total GT strength lies below the ground state of those N = Z mother nuclei, and there seems to be a good chance to observe/?-delayed proton emission. PACS: 21.10.Re; 21.60.Jz; 23.40.Hc The giant resonances (GR) of spin-isospin excitation modes of /~-stable nuclei have been studied since the eighties, using charge exchange reactions such as (p, n) and (3He, t). See, for example, in [1,2]. The isopin-dependent properties of nuclei far from fl-stability may show a dramatic difference from that of stable nuclei and are currently of broad interests, especially because the recent development of experimental facilities as well as currently planned projects may give an actual chance of measuring them. The quantitative information on the isospin-dependent modes in nuclei far from the/~-stability line is also of great interests in nuclear astrophysics. It was pointed out in [3,4] that in very light neutron-drip-line and in medium-heavy proton-drip-line nuclei the GT GR might be reached by ]~-decay and by fl+ decay, respectively. Namely, the major strength of GT GR may be placed below the ground state of respective mother nuclei. The deformation and pair correlation, which were neglected in the calculation of [3,4], can be important in some of nuclei studied there. Thus, in this letter we present the calculated result of three nuclei, 72 76 36Kr36, 38Sr38 and 4S~ using the deformed HF calculation together with the quasiparticle TDA. Those neutron-deficient N = Z nuclei are chosen here, especially because we are stimulated by learning the possibility [5] of having experimental information on the part of GT GR strength expected to lie at higher excited states of daughter nuclei, which are populated by /~+-decay. Some experimental result of the GT/~+ decay of 76Sr to lower-lying states of the daughter nucleus, 76 37Rb39, can be found in [6]. The observed small excitation energy [7] of the first 2 + state, 709, 261 and 290 keV in 72Kr, 76Sr and 8~ respectively, already suggests that these nuclei are deformed, though a direct experimental information on the shape is not yet available. Those nuclei are predicted to be deformed according to various theoretical calculations [8,9]. The/~-decay half-lives of 76Sr and 8~ were estimated in [10] without introducing the possibility of deformed shape.First, we perform deformed HF calculations using Skyrme interactions [11]. In order to obtain a HF minimum at a reasonable deformation, pair correlations have to be included. We use the BCS approximation with a given pairing-gap parameter, ...

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“…Recognising this and appreciating the ineffectualness of claims of 'temporarily borrowing', small changes in people's visibility to the state are important (Varley, 1987). For example, the simple registration of shacks through painting numbers on the walls or doors is perceived as a step towards clarifying property rights, albeit it small and often reversible.…”

Section: Evidence From South African Urban Informal Land Marketsmentioning

confidence: 99%

Conceptualising the potential of informal land markets to reduce urban poverty

Marx

2009

International Development Planning Review

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The Relationship between Tenure Legalization and Housing Improvements: Evidence from Mexico City

Cited by 74 publications

References 10 publications

Feeling and thinking: Quantifying the relationship between perceived tenure security and housing improvement in an informal neighbourhood in Buenos Aires

Feeling and thinking: Quantifying the relationship between perceived tenure security and housing improvement in an informal neighbourhood in Buenos Aires

Dependence of Gamow-Teller? +-decay of80Zr,76Sr and72Kr on nuclear shape

Conceptualising the potential of informal land markets to reduce urban poverty

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