To measure corporate reputation, you can use 'Reputation Quotient SM' (RQ) Fombrun and Harris). It consists of 20 statements in 8 sub-scales. It is applied for a large heterogeneous sample. Corporate reputation is a construct combining two factors: Emotional Appeal (1 Sub-Scale) and Rational Appeal (Five Sub-Scale).

For perceived CSR:

Article How Do Employees Perceive Corporate Responsibility? Developm...

Yanica Dimitrova , Heiko Breitsohl , Ali Ahmadi

You are wellcome,Mohamed!

It may not be the case that fundamentally you need "measurement" in a cardinal sense. In the work that I have done with colleagues (see attached paper that is referenced in my ResearchGate profile), we put the accent on a transparent structuring across stakeholders and across performance/acceptability issues. Reputation is in the eyes of a beholder; so: WHOSE EYES, and WHY?.

Best regards,

Martin O'CONNOR

For perceived CSR:

Consumers’ Perceptions of Corporate Social Responsibilities: A Cross-Cultural Comparison (Isabel Maignan).

Measuring Corporate Social Responsibility: A Scale Development Study (Duygu Turker). This one is not exactly about perception, but it might be useful.

For organizational reputation:

The Reputation Index: Measuring and Managing Corporate Reputation ( Cravens, K., Oliver, E. G., & Ramamoorti, S.)

Designing a Formative Measure for Corporate Reputation (Sabrina Helm).

The quality of protection of social responsibility by the company can be measured by different indicators. For instance, the percentage of the costs incurred on social responsibility in profit or on one employee and the other.

Every enterprise must publish a social responsibility report.

Thank you very much Izolda Chiladze , Lucy Erazo , Martin Paul O'Connor

A study on CSR implementation: with special reference to employer brands and organizational reputation.

Using 7 point likert Scale through structured questionnaire

There are a number of measures of CSR and overall reputation that are effective. In our forthcoming paper in the Journal of Consumer Psychology (JCP), my co-authors modified a scale so that it measures a reputation for social responsibility using just two items. We also included measures for a reputation of ability and overall brand affect, which can serve as a good measure of brand reputation.

This article link, along with a Methodological Data Appendix (MDA), can be seen here. The MDA is valuable, as it will provide you with the core measures that were used in our study.

Article Good Guys Can Finish First: How Brand Reputation Affects Ext...

We developed our scales related to ability and social responsibility based on scales developed by Brown and Dacin (1997). You can find that scale here:

https://www.jstor.org/stable/1252190?seq=1#metadata_info_tab_contents

For other relevant scales that can be used in CSR research, my co-authors and I looked at measures like WOM, evaluations, etc. in another study as well. You can see that paper here:

Article Brand associations: the value of ability versus social respo...

As an economist, here are my suggested reliable and widely used measurement scales for perceived CSR, perceived employer brands, and organizational reputation:

Perceived CSR (Corporate Social Responsibility):

• Turker’s (2009) CSR Scale: This scale measures CSR across four dimensions: CSR towards social and non-social stakeholders, employees, customers, and the government. It's a 5-point Likert scale, widely used in academic research to assess how CSR activities are perceived by various stakeholders.
• Carroll’s (1991) CSR Pyramid Model: This model categorizes CSR into economic, legal, ethical, and philanthropic responsibilities. Researchers often adapt survey questions from this model to create a comprehensive measurement scale for perceived CSR.

Perceived Employer Brands

• Employer Attractiveness (EmpAt) Scale (Berthon et al., 2005): This scale measures the attractiveness of an employer's brand across five factors: interest value, social value, economic value, development value, and application value. It uses a 7-point Likert scale and is well-regarded for assessing employer branding perceptions.
• Employer Branding Index (EBI): This index assesses employer branding on various dimensions such as employee engagement, work culture, and value proposition. It's commonly used by companies to measure their employer brand perception in the market.

Organizational Reputation:

• Fombrun, Gardberg, & Sever (2000) Reputation Quotient (RQ): This scale measures organizational reputation across six dimensions: emotional appeal, products and services, vision and leadership, workplace environment, financial performance, and social responsibility. The RQ is considered one of the most reliable tools for assessing reputation.
• Wartick’s (2002) Organizational Reputation Scale: This scale focuses on stakeholders’ perceptions of an organization’s overall reputation and has been used in various studies to capture the general view of a company's standing in the industry.

I hope this suggestion will help you.