title: Evaluating and using remote sensing data for studying economic activity and population change in China

authors: Zhang, Xiaoxuan

abstract: use of remote sensing data, especially night-time lights (NTL) data, has flourished
in recent decades as a proxy for measuring economic activity and the spatial distribution
of population. The availability of these data can make up for the absence of and possible
inaccuracy in traditional economic statistics, especially because NTL data are available
at fine scale and with high frequency. The growing use of these data raises the question
of how accurate is this night-time lights proxy, and for what purposes is it best suited
when studying economic development and population changes at sub-national levels.
In the first part of this thesis, a 20-year time-series of GDP at China’s third
sub-national level (counties, county-level cities and districts) and census population
counts at the same level from 2000, 2010 and 2020, are used as a benchmark to examine
the performance of multiple sources of NTL data as proxies for local economic activity
and inequality. I also test the accuracy of gridded population estimates, some of which
rely on NTL data, for estimating inter-census changes in local population.
Based on the comprehensive evaluation of different NTL sources at different levels of
spatial aggregation, the second part of the thesis uses NTL and other remote sensing
data, in conjunction with the traditional GDP and population statistics, to study a set of
economic issues that are pertinent to regional development in China. The impact of
administrative upgrading of county-level units (a type of regional policy practiced in
China) and of modern transport infrastructure is studied, using both GDP and NTL data
to measure economic impacts. These studies use spatial econometric models that allow
for spillovers. The changes in the city size distribution, in terms of land and people, is
also studied because of the possibility that China’s cities are physically expanding in
places other than where the population is moving.
Overall, the thesis contributes a nuanced understanding of how NTL data and
other remote sensing data can assist in studying complex social and economic problems,
as well as raising some caveats about the limits to the uses of such data.

text: Evaluating and using remote sensing data for studying economic activity and population change in China use of remote sensing data, especially night-time lights (NTL) data, has flourished
in recent decades as a proxy for measuring economic activity and the spatial distribution
of population. The availability of these data can make up for the absence of and possible
inaccuracy in traditional economic statistics, especially because NTL data are available
at fine scale and with high frequency. The growing use of these data raises the question
of how accurate is this night-time lights proxy, and for what purposes is it best suited
when studying economic development and population changes at sub-national levels.
In the first part of this thesis, a 20-year time-series of GDP at China’s third
sub-national level (counties, county-level cities and districts) and census population
counts at the same level from 2000, 2010 and 2020, are used as a benchmark to examine
the performance of multiple sources of NTL data as proxies for local economic activity
and inequality. I also test the accuracy of gridded population estimates, some of which
rely on NTL data, for estimating inter-census changes in local population.
Based on the comprehensive evaluation of different NTL sources at different levels of
spatial aggregation, the second part of the thesis uses NTL and other remote sensing
data, in conjunction with the traditional GDP and population statistics, to study a set of
economic issues that are pertinent to regional development in China. The impact of
administrative upgrading of county-level units (a type of regional policy practiced in
China) and of modern transport infrastructure is studied, using both GDP and NTL data
to measure economic impacts. These studies use spatial econometric models that allow
for spillovers. The changes in the city size distribution, in terms of land and people, is
also studied because of the possibility that China’s cities are physically expanding in
places other than where the population is moving.
Overall, the thesis contributes a nuanced understanding of how NTL data and
other remote sensing data can assist in studying complex social and economic problems,
as well as raising some caveats about the limits to the uses of such data.

year: 2024

title: Credit guarantee schemes supporting small enterprise development: A review

authors: Samujh, Helen

subjects: Micro-finance

abstract: Access to finance has become increasingly difficult, particularly for new and service-based industries without tangible assets to use as security. Globally, credit guarantee schemes (CGS) are seen as important instruments to facilitate achievement of national economic goals, as they enable entrepreneurs to gain access to finance for venture creation and development. We reviewed CGS literature between 1990 and early 2011. We discovered largely descriptive studies on the various conditions of the guarantees, and considerable research gaps. The desirability of CGS appears to be assumed whilst measurement of CGS performance provides ambiguous results. We recommend research in a variety of areas including: identification of factors that minimise risk, the impacts of varying risk sharing ratios, unintended CGS consequences, reporting the social dimensions, valuing intangibles, default rates in Asian countries, and collateral in a knowledge based economy.

text: Credit guarantee schemes supporting small enterprise development: A review Access to finance has become increasingly difficult, particularly for new and service-based industries without tangible assets to use as security. Globally, credit guarantee schemes (CGS) are seen as important instruments to facilitate achievement of national economic goals, as they enable entrepreneurs to gain access to finance for venture creation and development. We reviewed CGS literature between 1990 and early 2011. We discovered largely descriptive studies on the various conditions of the guarantees, and considerable research gaps. The desirability of CGS appears to be assumed whilst measurement of CGS performance provides ambiguous results. We recommend research in a variety of areas including: identification of factors that minimise risk, the impacts of varying risk sharing ratios, unintended CGS consequences, reporting the social dimensions, valuing intangibles, default rates in Asian countries, and collateral in a knowledge based economy.

year: 2012

title: Introduction to tephra-derived soils, North Island, New Zealand: University of Waikato and University of Wisconsin-Platteville post-conference Andisol excursion, 21-23 December, 2016

authors: Lowe, David J.

abstract: Provisional itinerary DAY 1 Wednesday 21 December: Mamaku Plateau-Rerewhakaaitu-Lake Tarawera: 1 Goodwin Farm, Tapapa Rd, Tapapa: welded ignimbrite, tephras, loess, buried soils (Tirau soil) - stratigraphy of sequence (230 ka and younger) and upbuilding pedogenesis - Tirau silt loam 2 Brett Rd, Rerewhakaaitu: Holocene tephras and buried soil (Rotomahana soil) - Volcanic landscape, historical importance of area for NZ soil survey - Stratigraphy of sequence (~9.5 cal ka to 10 June 1886 Tarawera eruption) and upbuilding pedogenesis - Rotomahana sandy loam, 3 Ash Pit Rd, Rerewhakaaitu: tephras and buried soils (Matahina soil) - Matahina gravel - buried spodic/podzol soil features, 4 Okareka Loop Rd tephra section with proximal Rotorua Tephra and buried soils, loess, Buried Village Museum, Te Wairoa, Lake Tarawera (Stoney Point). DAY 2 Thursday 22 December: Otorohanga-Waitomo Caves -Pirongia Mountain: 1 Raynes Road section: Ultisol in composite tephra sequence (Kainui soil), 2 Otorohanga Kiwi House, 3 Waitomo Caves,, 4 Pirongia Mountain: Mangakara forest walk, 5 Evening meal on an Andisol. DAY 3 Friday 23 December: Hobbiton, Hamilton gardens including Te Parapara (ancient Maori garden): 1. Hobbiton tour 10.15 am (2 hrs), 2. Hamilton Gardens incl. Te Parapara Garden and human-modified soils (Tamahere soil).

text: Introduction to tephra-derived soils, North Island, New Zealand: University of Waikato and University of Wisconsin-Platteville post-conference Andisol excursion, 21-23 December, 2016 Provisional itinerary DAY 1 Wednesday 21 December: Mamaku Plateau-Rerewhakaaitu-Lake Tarawera: 1 Goodwin Farm, Tapapa Rd, Tapapa: welded ignimbrite, tephras, loess, buried soils (Tirau soil) - stratigraphy of sequence (230 ka and younger) and upbuilding pedogenesis - Tirau silt loam 2 Brett Rd, Rerewhakaaitu: Holocene tephras and buried soil (Rotomahana soil) - Volcanic landscape, historical importance of area for NZ soil survey - Stratigraphy of sequence (~9.5 cal ka to 10 June 1886 Tarawera eruption) and upbuilding pedogenesis - Rotomahana sandy loam, 3 Ash Pit Rd, Rerewhakaaitu: tephras and buried soils (Matahina soil) - Matahina gravel - buried spodic/podzol soil features, 4 Okareka Loop Rd tephra section with proximal Rotorua Tephra and buried soils, loess, Buried Village Museum, Te Wairoa, Lake Tarawera (Stoney Point). DAY 2 Thursday 22 December: Otorohanga-Waitomo Caves -Pirongia Mountain: 1 Raynes Road section: Ultisol in composite tephra sequence (Kainui soil), 2 Otorohanga Kiwi House, 3 Waitomo Caves,, 4 Pirongia Mountain: Mangakara forest walk, 5 Evening meal on an Andisol. DAY 3 Friday 23 December: Hobbiton, Hamilton gardens including Te Parapara (ancient Maori garden): 1. Hobbiton tour 10.15 am (2 hrs), 2. Hamilton Gardens incl. Te Parapara Garden and human-modified soils (Tamahere soil).

year: 2016-12-21