Specification Checks Research Articles

Long-term effects of deep institutional shocks: Historical evidence from Mexico

This paper examines the potential impact of institutional shocks on long-term development of property rights and on institutions regulating contracting. The paper seeks to demonstrate that the external institutional shocks might have an uncontemplated side-effect on the institutional development of Mexico. The analysis exploits the within-country variation in the presence of US administrative authorities during the Mexican-American conflict across Mexican states and cities. Using propensity score and nearest neighbour matching technique, we present some evidence of the potential long-term institutional implications of the presence of US administrative authorities. We show that the presence of US administrative authority generated an unexpected positive effect which could influence long-term property rights and contracting institutions of Mexican states. The positive impact of US administrative authorities’ presence are robust to a variety of specification checks and are particularly large for smaller cities.

Urban environmental regulation, firms’ emission reduction strategies and labor demand: Evidence from China

Air pollution affects people's livelihoods, and China's environmental governance is a defensive battle that must be fought. Combining several comprehensive datasets, this study uncovers the underlying mechanisms of urban environmental regulation that affect labor demand from the perspective of firms’ choice of emission reduction strategies. Utilizing a difference-in-differences method, this study finds that on average, the Key City Demarcation Scheme for Air Pollution Prevention and Control (KCDS) has a drive-out effect on employment while improving urban environmental quality, making it difficult to achieve the double-dividend of de-pollution and employment promotion. These conclusions still hold after considering various specification checks, including the instrumental variable method. Underlying mechanisms indicate that manufacturing firms strengthen both front-end productive “changes-in-process” and non-productive “end-of-pipe” treatment to respond to stricter urban environmental enforcement, and ultimately, KCDS has triggered a drive-out effect on employment. Heterogeneous effects investigate that firms’ emission reduction strategies have path dependence and that the drive-out effect on employment is particularly pronounced for large-scale, technology- and capital-intensive domestic firms in large cities. This study provides policy insights for the smooth realization of the urban green transformation while safeguarding the livelihood of society.

Mobile banking apps and the informal economy: evidence from survey data in Indonesia and Bangladesh

ABSTRACT Reducing preference for cash and supporting the adoption of digital financial services can help achieve financial inclusion while also diminishing economic informality. However, previous evidence suggests that increased access to formal banking services has not resulted in an immediate reduction in usage of informal services. This paper estimates the effects of mobile phone banking apps on the demand for cash using unique survey data from Bangladesh and Indonesia. Our models indicate that having access to a banking or payment app reduces a variable capturing preference for cash by between 4% and 10%. The results are robust to a range of specification checks (including the inclusion/omission of various controls) which suggests that confounding from unobservables is unlikely to be a substantive source of bias. Since cash is the preferred payment mechanism for the poor in developing countries, the results suggest that access to digital banking apps may reduce informality within the finance sector, leading to broader development implications.

Real Estate Development Feasibility and Hurdle Rate Selection

Real estate developers typically assess potential projects using feasibility analyses and industry-standard heuristics, which include capital costs, return on costs, and a subjective risk measure. This study explores real estate developers’ decision-making practices in selecting hurdle rates and common feasibility analysis techniques, surveying 225 Australian and New Zealand developers. The main findings are that most developers use specific ‘go/no-go’ hurdle rate mechanisms irrespective of primary real estate type, with the majority using margin on development cost (MDC) or internal rate of return (IRR); the boundaries between traditional speculative development and real estate investment through the use of securitization methods have become blurred; many developers use both quantitative metrics, with qualitative methods and specific structural checks to manage the risks involved; and the two most frequent methods of determining site value prior to acquisition are the residual land value and discounted cash flow methods. Most place a heavy reliance on industry-accepted heuristics and do not have a predetermined process and method for altering or adapting the chosen hurdle rates and benchmarks. This research provides a contribution to property development practice from the Antipodean perspective which until now has been more focused on the UK view, enabling more generalized application internationally.

ACPSEM position paper: pre-treatment patient specific plan checks and quality assurance in radiation oncology.

The Australasian College of Physical Scientists and Engineers in Medicine (ACPSEM) has not previously made recommendations outlining the requirements for physics plan checks in Australia and New Zealand. A recent workforce modelling exercise, undertaken by the ACPSEM, revealed that the workload of a clinical radiation oncology medical physicist can comprise of up to 50% patient specific quality assurance activities. Therefore, in 2022 the ACPSEM Radiation Oncology Specialty Group (ROSG) set up a working group to address this issue. This position paper authored by ROSG endorses the recommendations of the American Association of Physicists in Medicine (AAPM) Task Group 218, 219 and 275 reports with some contextualisation for the Australia and New Zealand settings. A few recommendations from other sources are also endorsed to complete the position.

Verifiable Ideal Guard Point Standard For Air Pollution: A Statistical Analysis

The Ideal Standard can be characterized as a proclamation about the number of inhabitants in toxin which is set with no strategy by which consistency is to be tried or screened. For instance, with the Best Standard, we can't register the likelihood that a specific checking site will be in control in the approaching year. Barnett and O'Hogan (1997) presented the idea of the Factual Obvious Ideal Norm (SVIS). The thought is to join the Optimal Norm with a genuinely based rule of execution. To this end, conventional factual apparatus might be utilized. We might utilize Neyman Pearson's Approach of Speculation testing to build SVIS. In this paper, we develop SVIS because of the Neyman Pearson Speculation testing system and research the Air Nature through SVIS.

Maisonneuve fracture treated with suture-button system stabilization combined with plate and arthroscopic assistance (SBPAA): Clinical and radiological evaluation in short-medium period

The aim of this study was to estimate the time needed for patients with Maisonneuve fractures to return to routine activities, after treatment with a suture-button system stabilization combined with plate and arthroscopic assistance (SBPAA). MethodsThe study included 13 patients treated at our surgical department from January 2018 to June2022. Specific radiographical follow-up and periodic checks were performed in a short -to-medium term period, to evaluate syndesmosis evolution and tibiofibular overlap with medial clear space (MCS). ResultsProgressive recovery and improvement were observed during follow-up from both radiographic and clinical perspective. Data showed that patients were able to return to full weight-bearing walking around the ninth week and to sport activities in 7.5 months. Long-term complications associated with residual joint stiffness, complex regional pain syndrome, or wound complications were observed in three patients. ConclusionsIntraoperative arthroscopy represent a valid diagnostic tool to better recognize and evaluate osteochondral lesions in case of syndesmosys. The study demonstrates the importance of intraoperative arthroscopy for recognizing and treating associated osteochondral lesions with proper syndesmosis evaluation. Plate associated to double TightRope represent valid solution to functionally fix and reduce fractures. Additionally, it imitates the normal syndesmosis's anatomy and provides elasticity and robustness, guaranteeing a rapid return to sporting activity. Data and casuistry support these findings.

Why Should I Trust Your Code?

For Confidential Computing to become ubiquitous in the cloud, in the same way that HTTPS became the default for networking, a different, more flexible approach is needed. Although there is no guarantee that every malicious code behavior will be caught upfront, precise auditability can be guaranteed: Anyone who suspects that trust has been broken by a confidential service should be able to audit any part of its attested code base, including all updates, dependencies, policies, and tools. To achieve this, we propose an architecture to track code provenance and to hold code providers accountable. At its core, a new Code Transparency Service (CTS) maintains a public, append-only ledger that records all code deployed for confidential services. Before registering new code, CTS automatically applies policies to enforce code-integrity properties. For example, it can enforce the use of authorized releases of library dependencies and verify that code has been compiled with specific runtime checks and analyzed by specific tools. These upfront checks prevent common supply-chain attacks.

Ethnolinguistic diversity, quality of local public institutions, and firm-level innovation

Institutional quality is crucial for innovation and economic growth. In this article, we exploit historical linguistic differences across Slovenian municipalities between the Italian, German, and Slovenian-speaking population prior to World War 1, as a plausible exogenous source of variation in firm-level innovation to estimate the effect of institutional quality on innovation. Employing a set of limited dependent variable and instrumental variable models, we show that greater historical exposure to multilingualism is associated with markedly better quality of government and provision of public goods, more impartial local government administration, and lower prevalence of corruption, which in turn predicts systematically more vibrant economic activity, greater economic complexity, and higher rates of firm-level innovation at the local level. The estimated effects are robust to a variety of specification checks and do not appear to be sensitive to the choice of ethnic and linguistic diversity measures.

An ontology design for validating childhood cancer registry data.

Ontologies can provide a valuable role in the work of cancer registration, particularly as a tool for managing and navigating the various classification systems and coding rules. Further advantages accrue from the ability to formalise the coding rule base using description logics and thereby benefit from the associated automatic reasoning functionality. Drawing from earlier work that showed the viability of applying ontologies in the data validation tasks of cancer registries, an ontology was created using a modular approach to handle the specific checks for childhood cancers. The ontology was able to handle successfully the various inter-variable checks using the axiomatic constructs of the web ontology language. Application of an ontological approach for data validation can greatly simplify the maintenance of the coding rules and facilitate the federation of any centralised validation process to the local level. It also provides an improved means of visualising the rule interdependencies from different perspectives. Performance of the automatic reasoning process can be a limiting issue for very large datasets and will be a focus for future work. Results are provided showing how the ontology is able to validate cancer case records typical for childhood tumours.

Designing a novel method based on multiplex PCR for detecting various meat of birds in processed ground meat products

Falsified food directly influences wildlife, fair trade, religion, and the health of society. Here, we report a multiplex polymerase chain reaction to evaluate the accurate determination of seven species of bird meat in meals on a single assay platform. To amplify segments of DNA fromColumba livia, Corvus moneduloides, Gallus gallus, Coturnix japonica, Phasianus colchicus, Struthio camelus, and Meleagris gallopavomeats, respectively, a total of seven sets of species-specific primers targeting the mitochondrial and cytochrome b genes were developed. Gel photographs and electrochromatography from an Experion Bioanalyzer were used to identify all PCR products. Species specificity checks discovered no cross-species amplification. The applicability of its screening to find target species in processed food was shown in commercial and model meatballs. A validation study revealed that the test is reliable, quick, affordable, repeatable, specific, and accurate down to 50,000 mitochondrial copies. It might be used for raw meats and products involving processed and severely deteriorated food samples. The customers, the food business, and law enforcement would all benefit immensely from this suggested approach.

Verifiable Ideal Guard Point Standard For Air Pollution: A Statistical Analysis

The Ideal Standard can be characterized as a proclamation about the number of inhabitants in toxin which is set with no strategy by which consistency is to be tried or screened. For instance, with the Best Standard, we can't register the likelihood that a specific checking site will be in control in the approaching year. Barnett and O'Hogan (1997) presented the idea of the Factual Obvious Ideal Norm (SVIS). The thought is to join the Optimal Norm with a genuinely based rule of execution. To this end, conventional factual apparatus might be utilized. We might utilize Neyman Pearson's Approach of Speculation testing to build SVIS. In this paper, we develop SVIS because of the Neyman Pearson Speculation testing system and research the Air Nature through SVIS.

How Does Trade Openness Affect Output Growth? A Perspective from the Input Diversity

Globalization has led to a rapid increase in the international trade of intermediate goods, which plays a vital role in economic growth. This study investigates whether trade openness facilitates output growth by improving access to intermediate inputs. In particular, it has been examined whether industrial sectors with higher intermediate input diversity grow relatively faster in countries that are more open to trade. Through the adoption of the difference-in-differences approach, we find strong evidence that this is indeed the case based on a large cross-country sample. The empirical estimation indicates that industries more diversified in intermediate inputs will grow by 2.6 percentage points faster in more outward-oriented countries. Furthermore, our results are robust to various specification checks and are unlikely to be driven by omitted variables, outliers, or reverse causality. By identifying the mechanism through which trade openness facilitates output growth, our study highlights the additional gains from trade liberalization that may be undermined by increased protectionism, especially for industrial sectors that rely on diversified intermediate inputs.

Enhancing economic freedom via school choice and competition: Have state laws been enabling enough to generate broad‐based effects?

AbstractAn aspect of economic freedom that varies across U.S. states is K‐12 educational freedom. Some states allow a degree of choice for families in selecting schools outside public schools for their children. However, the enabling laws for such programs are often quite restrictive and limited to few children. Can this limited degree of competition and choice have a noticeable effect on an entire state's overall K‐12 performance? I find strikingly large test score gains for states that have adopted voucher programs and/or Education Savings Accounts (ESAs), swamping the effect of per pupil K‐12 spending on test scores. Moreover, vouchers and ESAs are associated with less per pupil spending. These effects are robust to a host of specification checks. A key factor is the amount of a program's funding that “follows the student,” even if a small number of students are eligible. Overall, it seems that even a small measure of educational freedom has a large effect.

The Relationship between the Prevalence of the Urgent and Emergency Care Vanguard Participance and Delayed Transfers of Care in English Local Authorities

This paper examines the relationship between the prevalence of the urgent and emergency care vanguard (UEC) at the local authority level and their delayed transfers of care (DTOC) rates in England. We created a novel measure of exposure to UEC vanguards based on the residence of patients who used UEC partner hospitals, and we group it by the level of exposure (high, medium, low, none). We use this measure to estimate the effect of UEC vanguards on DTOC rates and then on DTOC rates by sector and a range of reasons associated with the delay. The analysis was run at the local authority level (LA) using quarterly data from NHS England for 150 English LAs from the years 2012–2017. We find a statistically significant UEC exposure effect of around 0.3% reduction in total DTOC to a 1% increase of UEC exposure (equivalent to 775 DTOC days per local authority per quarter in high UEC exposure areas), a result robust to various specification checks. Nonacute sector DTOC was found to be more responsive to UEC vanguards in comparison to acute sector DTOC (0.4% and 0.3% reductions, respectively, to every 1% of UEC exposure). DTOC due to social care was particularly responsive to UEC exposure (0.7% reduction to 1% exposure). DTOC reasons associated with the highest impact of UEC exposure were as follows: awaiting a care package at own home, waiting for further NHS nonacute care, and completion of assessment (reductions of 0.5%, 0.3%, and 0.3% to 1% exposure, respectively). All three reasons were originally associated with the largest number of DTOC days. These findings further advocate for UEC vanguards having been successful at alleviating the pressure on hospitals related to DTOC.

Performance and acceptability of the TfL Urban Bus Sound (AVAS)

Transport for London's quiet-running bus fleet is required to include an Acoustic Vehicle Alerting System (AVAS) compliant with UNECE Regulation 138 and as part of a wider series of safety measures as set out in their Bus Safety Standard towards the London Mayor's 'Vision Zero' objectives. As a public body, TfL must ensure that the Urban Bus Sound AVAS implementation is fit-for-purpose from a safety standpoint, is considerate of driver working conditions and is consistently implemented across a number of vehicle types, manufacturers and fleet operators. Additionally, as quiet-running vehicles increase across the London bus network, it must consider the impact on the urban soundscape. Over the course of two years, Phase 2 of the project addressed practical implementation and quality assurance challenges, bringing together soundscape and acoustic testing, on-street public and key stakeholder surveys, workshops with multiple vehicle manufacturers and operators as well as engagement with bus drivers. The project concludes by providing an optimised AVAS solution with specification and vehicle checks documentation to ensure successful roll-out. The project provides an important view on considerations for how AVAS can be implemented on public transport vehicle fleets, to consider and work with a wide range of public and stakeholder requirements.

Family policy, intrahousehold bargaining, and child health

AbstractThis study examines the effects of an exogenous change in family policy in Ethiopia on women empowerment and the allocation of resources toward child health. Empowerment is formalized as an unobserved latent variable based on a large set of questions pertaining to women's autonomy and decision‐making power. Exploiting the time and regional variation in the implementation of the law, the study finds that early implementation of the reform increases women's access to information, literacy and education levels, and their assertiveness toward family planning and domestic violence. In addition, more decision power in the hands of women is found to have a positive impact on investments in the health and nutrition of children. The findings suggest that factors that do not enter the individual's preferences may affect outcomes for individuals and emphasize the role of intrahousehold heterogeneity. The results are robust to a battery of validity and specification checks.

Does the internet help the unemployed find jobs?

This study examines the effect of internet job search (IJS) on job-finding rates among unemployed job seekers during the rapid expansion of the internet from the mid-1990s to the early 2010s. To address endogenous selection into IJS, I use an instrumental variables (IV) strategy exploiting the rise of IJS within occupations over time, which varied across occupations depending on pre-internet exposure to computers at work. The analysis sample includes unemployed workers from the December 1998, August 2000, September 2001, October 2003, and July 2011 Current Population Survey (CPS) Computer and Internet Use Supplements and the September 1992 Basic Monthly CPS, longitudinally matched with their employment outcomes from the subsequent monthly CPS files. The IV estimates indicate that IJS increased the 15-month job-finding rate by 12.9 percentage points (25.1% relative to the mean). Results from placebo exercises and various specification checks support a causal interpretation of the estimated effects. Additionally, the effectiveness of IJS remained stable over time throughout the analysis period.

Kindergarten for All: Long Run Effects of a Universal Intervention

Theory and evidence points towards particularly positive effects of high-quality child care for disadvantaged children. At the same time, disadvantaged families often sort out of existing programs. To counter differences in learning outcomes between children from different socioeconomic backgrounds, European governments are pushing for universal child care. However, empirical evidence on the effects of universal programs is scarce. We provide evidence on the long-run effect on schooling of mandating kindergarten at age 5--6. Our identifying variation comes from a reform that lowered school starting-age from 7 to 6 in Norway in 1997. Our precise DD estimates reveal hardly any effect, both overall, across subsamples, and over the grading distribution. A battery of specification checks supports our empirical strategy.

Do sleep disruptions promote social fragmentation?

Sleep changes predate shifts in mood/affect, thought processing, mental and physical health, civic engagement, and contextual circumstances, among other things. Theory predicts that these changes may lead to shifts in political and social beliefs. Do sleep disruptions shape how individuals see the world, the people around them, and themselves in relation to others? In this article, we use daily survey data from the 77 waves (N ≈ 460,000) of the University of California, Los Angeles's 2019-2021 Nationscape Survey-a nationally representative political survey-to examine the effect of an exogenous short-term sleep disruption on measures of political views, polarization, and discriminatory beliefs. Using this data set, we leverage the modest sleep disruption that occurs at the start (and end) of Daylight Saving Time (DST) and employ a regression discontinuity in time design around the precise DST cutoff (which we supplement with event study models). Despite strong theoretical expectations and correlational connection between measures of sleep and many outcomes related to social fragmentation, we find that the DST change has little to no causal effect on citizens' levels of polarization or their discriminatory attitudes. These effects are precise enough to rule out small effects, robust to a host of specification checks, and consistent across potential subgroups of interest. Our work adds to a small but growing body of research on the social and political effects of sleep disruptions.