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Corporate social responsibility (CSR) and corporate political activities are complementary, and the coordinated management of corporate social responsibility and corporate political activities may lead to better firm performance. However, corporate social responsibility and corporate political activities should be aligned carefully to utilize this complementarity. Strategic flexibility, which is the ability of a firm to adapt to changes in the external environment and make necessary organizational modifications quickly, can help firms to align their corporate social responsibility and corporate political activities. This paper empirically investigates the political dimension and the interactive dimension which describes interactions between corporate social responsibility and corporate political activities together with strategic flexibility and their effects on firm performance through a study of 142 firms in Turkey using moderated multiple regression methods. The results show that, while the political dimension had an inverted U‐shaped effect on firm performance, indicating that only a moderate level of corporate political activities may improve financial performance, the interactive dimension had positive but limited implications for performance. Finally, it was found strategic flexibility plays a positive moderating role on the relationships between the interactive dimension and firm performance. It is concluded that complementarity between corporate social responsibility and corporate political activities which may result in better performance is contingent on strategic flexibility.

In a wellbore, loss of zonal isolation can be caused by the mechanical failure of the cement or by the generation of a microannulus. However, the behavior of the sealant is driven by the specific boundary conditions like the rock properties. Large-scale laboratory testing of the cement sheath in an annular geometry and in a confined situation was performed to simulate various well conditions and to evaluate the behavior of several sealants under simulated downhole stress conditions. The failure modes of the cement sheath were determined as a function of the cement mechanical properties, loading parameters, and boundary conditions. The results were used to validate an analytical model that predicts cement sheath failure. Introduction Interzonal communication in a wellbore may lead to loss of reserves, contamination of zones, production of unwanted fluids, or safety and environmental issues. Remedial solutions exist to repair the problems, but for technical or economical reasons, the well may be shut in or abandoned. To improve the lifetime of the well, the cement sheath must be chemically and mechanically durable. Sealants resistant to aggressive formation fluids are designed when required. In the same way, sealants should be designed to withstand the stresses experienced during production and well operations - e.g., casing pressure tests, stimulation treatments, or temperature changes during production cycles-throughout the well life. To achieve this, a better understanding of the mechanical behavior of different sealants under downhole conditions is required to design fit-for-purpose materials.1,2 Several papers have been written on the subject. According to Thiercelin et al.,3 changes in downhole conditions can cause mechanical damage to the cemented annulus (mechanical failure or creation of microannuli) that may lead to a loss of zonal isolation. The key conclusion of that paper was that instead of considering the strength of the sealant as the main property, one should rather look at the complete mechanical system formed by the steel casing, the cemented annulus, and the formation. Indeed, increase of pressure and/or temperature in the wellbore firstly expands the inner steel casing, which instantly imposes this deformation on the neighboring cement sheath. As a consequence, imposed displacements rather than imposed stresses are applied to the cement inner diameter (ID). At a greater time scale (the lifetime of the well), the cement sheath must withstand multiple displacement cycles. Several authors have proposed numerical models4,5 to simulate the sealant mechanical behavior and predict initiation of failures according to known mechanical properties of the complete system (steel, cement, and rock). A large-scale laboratory test for sealants in an annular geometry has been developed. Changes in the well conditions resulting in either the contraction or the expansion of the inner casing can be simulated. Furthermore, the confining role of the formation or outer casing can be evaluated. Such an experiment allows the evaluation of the sealant mechanical response under wellbore conditions. Indeed, the nature of stresses generated in the annulus (tensile and/or compressive) is similar to those the sealant must withstand in a real wellbore. The loading scenario simulated in the full-scale annular sealing test is close to reality. Several cement systems exhibiting different mechanical behaviors have been tested, and the experimental results have been compared with the predictions of a numerical model. Laboratory experimentation The experiments are designed to compare different cement formulations at room conditions in a large-scale annular geometry and determine the effect of cement mechanical properties and boundary conditions (rock stiffness) on cement cracking and permeability to air. Imposed deformations can be applied on the cement ID to simulate changes in wellbore conditions caused by variations of temperature and/or pressure. Equipment The equipment developed for the study is shown in Figs. 1 and 2. There are two main components.

Summary Loss of zonal isolation in a wellbore can be caused by mechanical failure of the cement or by development of a microannulus. However, behavior of the sealant is driven by specific boundary conditions such as rock properties. Large-scale laboratory testing of the cement sheath in an annular geometry and a confined situation was performed to simulate various downhole stress conditions and evaluate the behavior of several sealants. Failure modes of the cement sheath were determined as a function of cement mechanical properties, loading parameters, and boundary conditions. Results were used to validate an analytical model that predicts cement-sheath failure. Introduction Interzonal communication in a wellbore may lead to loss of reserves, contamination of zones, production of unwanted fluids, or safety and environmental issues. Remedial solutions exist to repair the problems, but for technical or economic reasons, the well may be shut in or abandoned. To maximize well life, the cement sheath must be chemically and mechanically durable. Sealants resistant to aggressive formation fluids should also be designed to withstand stresses exerted during production and well operations, such as casing-pressure tests, stimulation treatments, or temperature changes during production cycles. To achieve this design goal, a better understanding of the mechanical behavior of different sealants under downhole conditions is required.1,2 According to Thiercelin et al.,3 changes in downhole conditions can cause mechanical damage (e.g., mechanical failure or creation of microannuli) to the cemented annulus, which may lead to loss of zonal isolation. Thiercelin et al.'s paper3 concludes that the complete mechanical system formed by the steel casing, cemented annulus, and formation should be considered, rather than sealant strength alone. Increase of pressure and temperature in the wellbore first expands the inner steel casing, which instantly imposes this deformation on the surrounding cement sheath. This applies imposed displacements, rather than imposed stresses, to the cement inner diameter (ID). Over the lifetime of the well, the cement sheath must withstand multiple displacement cycles. Several authors4,5have proposed numerical models to simulate sealant mechanical behavior and predict initiation of failures according to known mechanical properties of the complete system (i.e., steel, cement, and rock). A large-scale laboratory test for sealants in an annular geometry has been developed. This test simulates changes in well conditions that cause contraction or expansion of the inner casing. It can also evaluate the confining role of the formation or outer casing. Such an experiment enables the evaluation of sealant mechanical responses under wellbore conditions. The tensile and compressive stresses generated in the annulus are similar to those the sealant must withstand in a real wellbore. Loading simulated in the full-scale annular sealing test is close to real field conditions. Several cement systems exhibiting different mechanical behaviors have been tested, and the experimental results have been compared with predictions of a numerical model.

Although there are few think tanks in Britain they have been credited with considerable influence on government policies since the late 1970s. This article charts their recent history, distinguishing between larger, ‘establishment’ bodies like the Policy Studies Institute and smaller, more politically partisan bodies such as the Centre for Policy Studies; generally the latter have enjoyed greater influence. It identifies the distinctive characteristics of these bodies–their ideological orientation, their concentration on élite opinion formers, their short to medium‐term horizons, their emphasis on originality and publicity. Think tanks face tactical dilemmas when pressing their views on Britain's comparatively closed system of government, in particular their choice between insider and outsider forms of persuasion; the tension between proximity to ministers and intellectual autonomy; and their advantages to politicians as deniable sources that can float new ideas, which can be counter‐balanced by politicians’ fluctuating appetite for radical ideas. As a case study the article examines the relations enjoyed by the Institute of Economic Affairs and the Centre for Policy Studies with Mrs Thatcher's government, and particularly the evolution of a potent network of influence embracing ministers, special advisers and backbenchers. Finally it considers the dangers of an overemphasis on novelty at the expense of feasibility, and the danger of burnout in the smaller think tanks dangers mitigated by the continuous turnover that operates in the world of think tanks.

Purpose The purpose of this paper is to investigate how using social media (SM) as a tool to influence demand motivates the distribution of different price promotion strategies to encourage consumers to utilize direct bookings, along with how this impacts revenue strategies and profitability. Design/methodology/approach This study surveyed hotel executives who hold managerial positions and revenue managers with a direct influence on pricing decisions and developed multiple regression analysis models for various pricing approaches. Findings This study confirms the relationship between distribution channels and dynamic pricing strategies, although the same is not true with respect to traditional pricing techniques. The authors found that the adoption of SM as a strategic tool provides a platform to promote tactical revenue management strategies and to practice differential pricing motives. Originality/value The findings of the study will help hotel revenue managers to take into account a new way of thinking – namely, an interactive response to consumers’ preferences to improve profitability, based on different pricing methods distributed through SM. In this context, SM has elevated pricing strategies to a new and particularly challenging level.