Post encroachment time threshold identification for right-turn related crashes at unsignalized intersections on intercity highways under mixed traffic

Abstract

Unsignalized intersections in developing countries experience many serious conflicts between cross-traffic due to indiscipline traffic manoeuvrability. Historically, Post Encroachment Time (PET) has gained attention as a proximal indicator to analyze crossing conflicts. However, identifying an appropriate PET threshold to classify critical conflicts for highly heterogeneous traffic scenario is still an unexplored area. Consequently, this study proposes a novel approach of PET threshold identification with proof of application by collecting data from ten intersections located on four-lane intercity highways in the National Capital Region (NCR), India. Both crossing conflicts and right-turn related crash data (for the left-hand drive) are collected. Their correlations are thoroughly studied for each PET threshold using a quantitative technique considering all and individual vehicle categories. Finally, a qualitative analysis is done by ranking the sites based on cumulative PET and related crashes to verify the proposed quantitative technique. A PET threshold of 1?s is obtained from both the techniques which can be used to identify critical conflicts for unsignalized intersections located on four-lane intercity highways. The proposed methodology will serve as an alternative, faster and effective tool to evaluate the hazardousness of unsignalized intersections located on intercity highways under highly heterogeneous traffic condition.     

The Corporate Side of the Blogosphere: Examining the Variations of Design and Engagement Among Fortune 500 Blogs

Using design and communication principles, this study uses a content analysis design to evaluate all active blogs from the 2011 Fortune 500 list (n = 125). The results indicate that corporate America has only modestly incorporated the dialogic principles into their blogs. Current corporate blogs are well-designed as far as making them searchable and easy to navigate; however, the blogs are mostly being used to provide information in a one-way manner rather than creating an open dialogue with consumers. While blogging can enhance relationships with stakeholders, corporate communicators must strive to develop legitimate conversations with their blog readers.     

Some Variants of Constrained Estimation in Finite Population Sampling

This is a review article that unifies several important examples using constrained optimisation techniques. The basic tools are three simple mathematical optimisation results subject to certain constraints. Applications include calibration, benchmarking in small area estimation and imputation. A final illustration is constrained optimisation under a general divergence loss.     

Bertrand equilibrium with subadditive costs

We show here, in contrast to recent results, that if firms have different cost functions (that are strictly subadditive), such that the ‘monopoly breakeven prices’ are different, then in a homogeneous product duopoly there is always a Bertrand equilibrium (either in pure strategies or in mixed strategies).     

Rural Economies and Transitions to Capitalism: Germany and England Compared (c.1200–c.1800)

Based on a synthesis of the empirical scholarship on England and Germany, this paper demonstrates that in both regions, rural socio‐economic developments from c.1200 to c.1800 are similar: this period witnesses the rise to numerical predominance and growing economic significance of the ‘sub‐peasant classes’, which had a growing impact on the market as a result of their increasing market dependence, and from which – towards the end of the period – a rural proletariat emerged. Against the influential theory of Robert Brenner, it is argued that the period c.1200–c.1400 cannot really be categorized as ‘feudal’ according to Brenner's definition; and ‘agrarian capitalism’ does not adequately describe the socio‐economic system that obtained by the end of the sixteenth century. A genuine transition to capitalism is only evident from after c.1750, and can be found in Germany as well as in England; it is predicated both on ideological shifts and on the evolution of the rural proletariat, which is only found in large numbers by or after c.1800.     

Financial Reporting Quality,Structural Problems and the Informativeness of Mandated Disclosures on Internal Controls

Even before firms report internal control weaknesses under the Sarbanes–Oxley Act (SOX), they are characterized by structural problems, are prone to internal control weaknesses, and have low financial reporting quality. If the stock market incorporates much of this information during the pre‐disclosure years, investors are less surprised when firms subsequently report internal control weaknesses under SOX. We find that for the pre‐disclosure period, firms reporting internal control weaknesses under SOX, (1) had structural problems, (2) were prone to internal control problems, and (3) had low financial reporting quality. Further, we provide direct evidence that stock prices during pre‐disclosure years incorporate much of the information about structural problems, the likelihood of internal control weaknesses, and low reporting quality. Finally, we find that many of these value‐relevant factors are not related to announcement period returns when firms eventually disclose such problems under SOX and that limited new information about structural problems is generated around this date. Our results provide a compelling explanation for the muted stock price reaction around the mandatory disclosure date.