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Discusses critically the concept of numerical flexibility arguing that strategies for numerical flexibility may in part be viewed as “emergent” strategies. Argues further that “emergent” strategies evolve as responses to the national institutional context. This context comprises laws and regulations which constrain firms from introducing numerical flexibility and trade unions which, acting on behalf of their members, will attempt to limit the scope of numerical flexibility. Demonstrates that since the 1980s the institutional contexts in which Norwegian and UK firms operate have diverged significantly, leading to expected differing rates of increased use of numerical flexibility. This is tested through a multivariate analysis of variations in numerical flexibility at the firm level on the basis of data from the 1995 Euronet‐Cranfield Survey.

This paper aims to examine how functional and numerical flexibility can be successfully combined without workforce segmentation or flexible employment contracts, by implementing a highly integrated human resource management (HRM) system.

Six case studies were conducted between January 2002 and June 2003 in Portuguese affiliates of multinational management consulting firms using a grounded theory approach.

Evidence from the case studies showed that some of these companies were able to explore both functional and numerical flexibility in a combined and interdependent way, by operating a tightly run and highly coordinated set of HRM practices geared towards the development of internal labour markets.

The study uses a sample of large multinational companies in a single sector, which limits the scope of these findings.

It is suggested that a strategy combining numerical and functional flexibility through an integrated set of HRM policies and practices will be more effective than segmenting the workforce or choosing between those two sources of flexibility.

The paper presents a new breadth for the role of HRM in achieving flexibility. Theoretically, it challenges the established notion that commitment‐based HRM serves only functional flexibility and that numerical flexibility can only be achieved through precarious employment.

The purpose of this paper is to analyse the moderator effect of inter‐organizational cooperation in the relationship between workplace flexibility and innovation performance.

Postal survey to a sample of manufacturing and service firms. Hierarchical regression.

It was found that innovation performance is positively associated to internal functional flexibility, and negatively to external numerical flexibility and outsourcing. Inter‐organizational cooperation moderates the relationships between functional flexibility, external numerical flexibility and outsourcing with innovation performance.

The study's single country setting could limit the generalizability of the findings. Longitudinal as opposed to cross‐sectional data are needed for studying the causal assumptions reported here.

The results of this study suggest that high‐cooperation firms may compensate the negative impact of external flexibility and perform better than low‐cooperation firms. External knowledge and cooperation can be complementary. Managers should take into account that the benefits from external workplace (e.g. access to new knowledge) may be enhanced in the context of inter‐organizational cooperation.

To the best of our knowledge, this is the first study that tests whether inter‐organizational cooperation moderates the relationship between external numerical flexibility and innovation performance. The paper also investigates and applies internal and external flexibility in a single study which allows to compare how each of them impacts innovation performance.

This paper aims to analyze the relationship between labour flexibility and innovation performance.

This paper is a review of theoretical perspectives to analyze this relationship. A postal survey of a sample of Spanish manufacturing and service firms was conducted and this was subject to nonparametric analysis.

High‐innovative Spanish firms are more flexible than low‐innovative firms although the comparison across industries and type of innovation indicates that not all flexibility dimensions are statistically significant in their relationship to innovation performance.

The study's single country setting could limit the generalizability of the findings. Longitudinal as opposed to cross‐sectional data are needed for studying the causal assumptions suggested by this research.

Given the differences of flexibility dimensions found across industries and type of innovation firms should use flexibility capabilities to complement innovation capabilities. On the other hand, some flexible managerial practices should be adopted as early as possible because they appear to be global in knowledge‐intensive firms and do not have differences across sectors and type of innovation.

This paper combines in the same analysis the relationship of internal and external flexibility with innovation performance, and their managerial implications.

The purpose of this paper is to analyse the contribution of human resource (HR) commitment practices to firm performance through the adoption of workplace practices that require the organisational climate created by HR commitment practices.

The approach is a survey of 156 Spanish firms and statistical test of research hypotheses through structural equation modelling.

The results indicate that the extent that employees have access to HR commitment practices and HR social benefits is positively related to the intensity of telework adoption. Firm performance is positively associated to the intensity of telework adoption, functional flexibility and internal numerical flexibility, and negatively related to external numerical flexibility. HR commitment practices impact directly and indirectly on different measures of firm performance.

Cross‐sectional, survey‐based data that cannot infer causality. Longitudinal and qualitative designs are needed to get a better understanding of the relationships. A follow‐up study of employees perception of several variables analysed in this study (e.g. access to HR commitment practices and employee benefits) could reveal possible contradictions between what policies managers claim there exist, and what policies employees perceive to exist.

The adoption of HR commitment practices can facilitate the organisational change required by the adoption of telework.

The findings provide evidence that HR commitment practices are indirectly related to firm performance through their effects on the use of flexibility practices like telework that require organisational climates containing high levels of trust.

The purpose of the paper is to explain the impact of workplace flexibility on managers' perceptions of firm performance. The research focuses primarily on outsourcing, an increasingly common way of creating workplace flexibility, by studying its antecedents based on several economic and organisational theories.

The methodology is a postal survey to a sample of 156 Spanish firms and statistical analysis.

The findings suggest that it is important to take into account different theoretical perspectives to explain the intensity of outsourcing: all proposed antecedents of the intensity of outsourcing except differentiation strategy and cooperation are significantly associated to outsourcing. There is not any significant relationship between outsourcing and firm performance; workplace internal flexibility does impact on firm performance but external flexibility does not. However, the results change according to the category of core and peripheral outsourcing.

This study's single country setting could limit the generalizability of the findings. Longitudinal as opposed to cross‐sectional data are needed for studying the causal assumptions reported here. Future studies should also take a multiple‐source as opposed to a single‐source data collection approach. Finally, objective measures of outsourcing and firm performance, as well as moderated variables are needed to analyse differentiated impacts on firm performance.

This research makes two contributions to both practice and theory. First, the results show that the perceived impact of outsourcing on sub‐factors of firm performance is positive for peripheral activities and negative for core activities. Second, the research provides a framework to analyse the antecedents of outsourcing and the concurrent impact of outsourcing and other workplace flexibility dimensions on firm performance.

The paper explains outsourcing decisions by antecedents based on several economic and organisational theories. It also analyses the concurrent impact of outsourcing and other workplace flexibility dimensions on firm performance.

Analyses the tensions between change and continuity in the German model of labour flexibility and examines why recent deregulation and decentralization measures only had a limited impact on companies’ flexibility approaches. Addresses the subsequent issues of how, and to what extent the framework for the several forms of flexibility should be broadened in the particular German context, where the institutional/regulatory environment has encouraged the widespread adoption of a diversified quality production strategy, based on high levels of functional flexibility. Concludes that a large section of German companies may already operate near an optional labour flexibility mix. Suggests system internal reforms based on regulated flexibility and centrally co‐ordinated decentralization, in order to enhance, to some extent, the framework for flexibility without undermining the underlying incentive structure for high skills/high productivity approaches to flexibility.

The study analyzes the relationship between human resources (HR) flexibility and absorptive capacity (AC) of knowledge in a sample of Spanish manufacturing firms. The purpose of the research is to analyze if firms with greater AC are more flexible than other firms and to assess the implications of different combinations of HR flexibility and AC for innovation.

The study sample consisted of 1,666 Spanish industrial firms in 2015 compiled from a large set of statements from the Survey of Business Strategies (SBS) questionnaire. The methodology includes a cluster analysis and a case study of selected firms. First, a k-means clustering analysis was carried out to explore how homogeneous are the SBS firms according to several HR flexibility and AC measures. The authors complement the clustering itself with some descriptive statistics for each cluster. Second, the statistical analysis is followed by a selection of case studies from industrial firms in different positions regarding innovation, AC, and HR flexibility. The information for the cases studies comes from secondary sources such as corporate governance reports and statements of managers and employees from company websites and public reports.

The empirical evidence indicates that some combinations of HR flexibility and AC are positively related to innovation outputs whereas others are not. Firms with greater AC, R&D effort and innovation outputs have less “bad” HR flexibility (external numerical flexibility from temporary employees and temporary help agencies) and more “good” HR flexibility (internal and external functional flexibility). On the contrary, firms with minimum or non-existent innovation and AC efforts have the highest levels of temporary employment and do not hire external R&D experts.

The limitations of the cross-sectional nature of the study make the authors cautious about any proposition that may suggest a causal relationship among the studied variables.

Managers should pay attention to the different implications of each HR flexibility dimension for innovation activities since innovative companies value more those HR flexibility dimensions that contribute to the dispersion of knowledge within the firm.

The authors propose a framework to analyze the combination of HR flexibility and AC most suitable to different types of firms. Based on the statistical analyses and the case studies, the authors propose some strategic implications useful for the management of human resources. The matrix's framework analyzes the firm's innovation strategies according to the interactions between AC and the mix of HR flexibility dimensions.

This paper investigates the use of contractual working flexibility (temporary and part‐time contracts) by Spanish small and medium sized enterprises (SMEs). A framework based on a contingency approach is used to identify variables that influence contractual working flexibility and is used to put forward a number of propositions and hypotheses that are tested using data collected from a survey of 602 Spanish SMEs. One‐way ANOVA analysis results reveal significant relationships between the level of contractual working flexibility and industry, life cycle, level of uncertainty, technological system, age, size and human resources practices. These findings are used to construct profiles of SMEs in relation to use of high and low levels of contractual working flexibility. The results suggest that various contingency factors as well as uncertainty, lead SMEs to develop different usage of contractual working flexibility.

The purpose of this paper is to further explore the relationship between several dimensions of human resource (HR) flexibility and firm performance by introducing two moderator effects: inter-organizational cooperation and environmental changes. There is need for such studies because the relationship between HR flexibility and firm performance remains ambiguous and inconclusive. Whereas some theoretical perspectives and empirical evidences suggest the need to develop and support full-time and permanent employees, others argue that flexible labour relations are beneficial to firm performance. One of the reasons that could explain the lack of conclusive evidences is the scarce use of moderator effects.

Research hypotheses are tested by structural equation analysis with data from a sample of 156 Spanish companies from different sectors.

The results confirm the positive influence of internal HR flexibility on firm performance whereas the influence of external flexibility depends of each dimension in relation to the level of knowledge involved. However, the main finding is that environmental changes and cooperation moderate positively the relationship between functional flexibility and financial performance, as well as between external high skilled expertise and performance (at total level and its subcategories) which focus the importance of flexibility in their contribution to accessing and deploying knowledge into the firm.

Main limitations are the small sample size, the use of cross-sectional data and a structured questionnaire. Longitudinal studies and larger samples should test the causal relationships suggested by the results of the paper. The assessment of flexibility at the enterprise level could also be extended in future studies at the network level since some firms may obtain functional and numerical flexibility through its relationships with other companies in networks. The study of the relationships between different combinations of flexible work and firm performance, considering different groups of employees, could follow from the recommendations of moderator effects found in this research.

Executives need to consider how the different units in the organizational structure interface with the contextual environmental, and they also need to understand the performance implications of different HR flexibility practices because their implications may change according to the exogenous business environment. The authors have found that the contribution of high skilled expertise from consulting/contracting firms is going to be more important than the contribution of short-term hires and temporary agency workers. Experts from outside not only bring knowledge of industry best practices into the firm that supports the innovative output, but they can also contribute to improve financial and relational performance. The results also suggest that external high skilled expertise may be more beneficial to the firm in highly changing environments than in more stable environments.

Two are the main contributions of the paper: first, it analyses the influence of a comprehensive group of HR flexible practices on three different dimensions of firm performance which helps to understand in greater detail the causal mechanisms that link HR flexibility and firm performance in comparison to other studies that are more focused on singular flexible practices and measures of firm performance; and second, the paper analyses the moderator effect of both environmental dynamism and inter-organizational cooperation, which advances the theoretical understanding of flexibility and firm performance by studying different scenarios of HR flexibilities with these two moderators. The results of the paper could help managers to take advantage of different combinations of flexibility dimensions according to contingent situations and in order to improve firm performance.